Safe Haskell	None
Language	Haskell2010

AOC2018.Prelude

Synopsis

(++) :: [a] -> [a] -> [a]
filter :: (a -> Bool) -> [a] -> [a]
zip :: [a] -> [b] -> [(a, b)]
fst :: (a, b) -> a
snd :: (a, b) -> b
trace :: String -> a -> a
map :: (a -> b) -> [a] -> [b]
($) :: (a -> b) -> a -> b
guard :: Alternative f => Bool -> f ()
join :: Monad m => m (m a) -> m a
class Applicative m => Monad (m :: Type -> Type) where
- (>>=) :: m a -> (a -> m b) -> m b
- (>>) :: m a -> m b -> m b
- return :: a -> m a
class Functor (f :: Type -> Type) where
- fmap :: (a -> b) -> f a -> f b
- (<$) :: a -> f b -> f a
class Monad m => MonadFail (m :: Type -> Type) where
- fail :: String -> m a
class Functor f => Applicative (f :: Type -> Type) where
- pure :: a -> f a
- (<*>) :: f (a -> b) -> f a -> f b
- liftA2 :: (a -> b -> c) -> f a -> f b -> f c
- (*>) :: f a -> f b -> f b
- (<*) :: f a -> f b -> f a
class Foldable (t :: Type -> Type) where
- fold :: Monoid m => t m -> m
- foldMap :: Monoid m => (a -> m) -> t a -> m
- foldr :: (a -> b -> b) -> b -> t a -> b
- foldr' :: (a -> b -> b) -> b -> t a -> b
- foldl :: (b -> a -> b) -> b -> t a -> b
- foldl' :: (b -> a -> b) -> b -> t a -> b
- foldr1 :: (a -> a -> a) -> t a -> a
- foldl1 :: (a -> a -> a) -> t a -> a
- toList :: t a -> [a]
- null :: t a -> Bool
- length :: t a -> Int
- elem :: Eq a => a -> t a -> Bool
- maximum :: Ord a => t a -> a
- minimum :: Ord a => t a -> a
- sum :: Num a => t a -> a
- product :: Num a => t a -> a
class (Functor t, Foldable t) => Traversable (t :: Type -> Type) where
- traverse :: Applicative f => (a -> f b) -> t a -> f (t b)
- sequenceA :: Applicative f => t (f a) -> f (t a)
- mapM :: Monad m => (a -> m b) -> t a -> m (t b)
- sequence :: Monad m => t (m a) -> m (t a)
class Generic a
class Semigroup a where
- (<>) :: a -> a -> a
- sconcat :: NonEmpty a -> a
- stimes :: Integral b => b -> a -> a
data Char
data Maybe a
- = Nothing
- | Just a
type Type = Type
data Constraint
newtype Last a = Last {
- getLast :: a
}
class NFData a where
- rnf :: a -> ()
data Map k a
class (Alternative m, Monad m) => MonadPlus (m :: Type -> Type) where
- mzero :: m a
- mplus :: m a -> m a -> m a
class Applicative f => Alternative (f :: Type -> Type) where
- empty :: f a
- (<|>) :: f a -> f a -> f a
- some :: f a -> f [a]
- many :: f a -> f [a]
(=<<) :: Monad m => (a -> m b) -> m a -> m b
when :: Applicative f => Bool -> f () -> f ()
liftM :: Monad m => (a1 -> r) -> m a1 -> m r
liftM2 :: Monad m => (a1 -> a2 -> r) -> m a1 -> m a2 -> m r
ap :: Monad m => m (a -> b) -> m a -> m b
ord :: Char -> Int
id :: a -> a
const :: a -> b -> a
(.) :: (b -> c) -> (a -> b) -> a -> c
flip :: (a -> b -> c) -> b -> a -> c
curry :: ((a, b) -> c) -> a -> b -> c
uncurry :: (a -> b -> c) -> (a, b) -> c
maybe :: b -> (a -> b) -> Maybe a -> b
isJust :: Maybe a -> Bool
isNothing :: Maybe a -> Bool
fromMaybe :: a -> Maybe a -> a
maybeToList :: Maybe a -> [a]
listToMaybe :: [a] -> Maybe a
catMaybes :: [Maybe a] -> [a]
mapMaybe :: (a -> Maybe b) -> [a] -> [b]
head :: [a] -> a
tail :: [a] -> [a]
last :: [a] -> a
init :: [a] -> [a]
scanl :: (b -> a -> b) -> b -> [a] -> [b]
scanl1 :: (a -> a -> a) -> [a] -> [a]
scanr :: (a -> b -> b) -> b -> [a] -> [b]
scanr1 :: (a -> a -> a) -> [a] -> [a]
iterate :: (a -> a) -> a -> [a]
repeat :: a -> [a]
replicate :: Int -> a -> [a]
cycle :: [a] -> [a]
takeWhile :: (a -> Bool) -> [a] -> [a]
dropWhile :: (a -> Bool) -> [a] -> [a]
take :: Int -> [a] -> [a]
drop :: Int -> [a] -> [a]
splitAt :: Int -> [a] -> ([a], [a])
span :: (a -> Bool) -> [a] -> ([a], [a])
break :: (a -> Bool) -> [a] -> ([a], [a])
reverse :: [a] -> [a]
lookup :: Eq a => a -> [(a, b)] -> Maybe b
(!!) :: [a] -> Int -> a
zip3 :: [a] -> [b] -> [c] -> [(a, b, c)]
zipWith :: (a -> b -> c) -> [a] -> [b] -> [c]
zipWith3 :: (a -> b -> c -> d) -> [a] -> [b] -> [c] -> [d]
unzip :: [(a, b)] -> ([a], [b])
unzip3 :: [(a, b, c)] -> ([a], [b], [c])
chr :: Int -> Char
(<$>) :: Functor f => (a -> b) -> f a -> f b
void :: Functor f => f a -> f ()
isSpace :: Char -> Bool
isDigit :: Char -> Bool
isAlpha :: Char -> Bool
isAlphaNum :: Char -> Bool
isUpper :: Char -> Bool
toLower :: Char -> Char
toUpper :: Char -> Char
isPrefixOf :: Eq a => [a] -> [a] -> Bool
isSuffixOf :: Eq a => [a] -> [a] -> Bool
isInfixOf :: Eq a => [a] -> [a] -> Bool
nub :: Eq a => [a] -> [a]
nubBy :: (a -> a -> Bool) -> [a] -> [a]
intersperse :: a -> [a] -> [a]
intercalate :: [a] -> [[a]] -> [a]
sort :: Ord a => [a] -> [a]
sortBy :: (a -> a -> Ordering) -> [a] -> [a]
unfoldr :: (b -> Maybe (a, b)) -> b -> [a]
lines :: String -> [String]
unlines :: [String] -> String
words :: String -> [String]
unwords :: [String] -> String
newtype Any = Any {
- getAny :: Bool
}
newtype All = All {
- getAll :: Bool
}
traverse_ :: (Foldable t, Applicative f) => (a -> f b) -> t a -> f ()
for_ :: (Foldable t, Applicative f) => t a -> (a -> f b) -> f ()
sequence_ :: (Foldable t, Monad m) => t (m a) -> m ()
concat :: Foldable t => t [a] -> [a]
concatMap :: Foldable t => (a -> [b]) -> t a -> [b]
and :: Foldable t => t Bool -> Bool
or :: Foldable t => t Bool -> Bool
any :: Foldable t => (a -> Bool) -> t a -> Bool
all :: Foldable t => (a -> Bool) -> t a -> Bool
notElem :: (Foldable t, Eq a) => a -> t a -> Bool
find :: Foldable t => (a -> Bool) -> t a -> Maybe a
optional :: Alternative f => f a -> f (Maybe a)
for :: (Traversable t, Applicative f) => t a -> (a -> f b) -> f (t b)
filterM :: Applicative m => (a -> m Bool) -> [a] -> m [a]
foldM :: (Foldable t, Monad m) => (b -> a -> m b) -> b -> t a -> m b
unless :: Applicative f => Bool -> f () -> f ()
data Set a
(<**>) :: Applicative f => f a -> f (a -> b) -> f b
liftA :: Applicative f => (a -> b) -> f a -> f b
liftA3 :: Applicative f => (a -> b -> c -> d) -> f a -> f b -> f c -> f d
liftM3 :: Monad m => (a1 -> a2 -> a3 -> r) -> m a1 -> m a2 -> m a3 -> m r
liftM4 :: Monad m => (a1 -> a2 -> a3 -> a4 -> r) -> m a1 -> m a2 -> m a3 -> m a4 -> m r
liftM5 :: Monad m => (a1 -> a2 -> a3 -> a4 -> a5 -> r) -> m a1 -> m a2 -> m a3 -> m a4 -> m a5 -> m r
fix :: (a -> a) -> a
readMaybe :: Read a => String -> Maybe a
mapM_ :: (Foldable t, Monad m) => (a -> m b) -> t a -> m ()
forM_ :: (Foldable t, Monad m) => t a -> (a -> m b) -> m ()
msum :: (Foldable t, MonadPlus m) => t (m a) -> m a
newtype Const a (b :: k) :: forall k. Type -> k -> Type = Const {
- getConst :: a
}
newtype ZipList a = ZipList {
- getZipList :: [a]
}
newtype WrappedArrow (a :: Type -> Type -> Type) b c = WrapArrow {
- unwrapArrow :: a b c
}
newtype WrappedMonad (m :: Type -> Type) a = WrapMonad {
- unwrapMonad :: m a
}
forM :: (Traversable t, Monad m) => t a -> (a -> m b) -> m (t b)
(>=>) :: Monad m => (a -> m b) -> (b -> m c) -> a -> m c
(<=<) :: Monad m => (b -> m c) -> (a -> m b) -> a -> m c
forever :: Applicative f => f a -> f b
mapAndUnzipM :: Applicative m => (a -> m (b, c)) -> [a] -> m ([b], [c])
zipWithM :: Applicative m => (a -> b -> m c) -> [a] -> [b] -> m [c]
zipWithM_ :: Applicative m => (a -> b -> m c) -> [a] -> [b] -> m ()
foldM_ :: (Foldable t, Monad m) => (b -> a -> m b) -> b -> t a -> m ()
replicateM :: Applicative m => Int -> m a -> m [a]
replicateM_ :: Applicative m => Int -> m a -> m ()
(<$!>) :: Monad m => (a -> b) -> m a -> m b
mfilter :: MonadPlus m => (a -> Bool) -> m a -> m a
vacuous :: Functor f => f Void -> f a
absurd :: Void -> a
data Void
option :: b -> (a -> b) -> Option a -> b
mtimesDefault :: (Integral b, Monoid a) => b -> a -> a
diff :: Semigroup m => m -> Endo m
cycle1 :: Semigroup m => m -> m
newtype Min a = Min {
- getMin :: a
}
newtype Max a = Max {
- getMax :: a
}
data Arg a b = Arg a b
type ArgMin a b = Min (Arg a b)
type ArgMax a b = Max (Arg a b)
newtype First a = First {
- getFirst :: a
}
newtype WrappedMonoid m = WrapMonoid {
- unwrapMonoid :: m
}
newtype Option a = Option {
- getOption :: Maybe a
}
class Bifunctor (p :: Type -> Type -> Type) where
- bimap :: (a -> b) -> (c -> d) -> p a c -> p b d
- first :: (a -> b) -> p a c -> p b c
- second :: (b -> c) -> p a b -> p a c
errorBadArgument :: a
errorMissingArgument :: a
errorShortFormat :: a
errorBadFormat :: Char -> a
perror :: String -> a
formatRealFloat :: RealFloat a => a -> FieldFormatter
formatInteger :: Integer -> FieldFormatter
formatInt :: (Integral a, Bounded a) => a -> FieldFormatter
formatString :: IsChar a => [a] -> FieldFormatter
formatChar :: Char -> FieldFormatter
vFmt :: Char -> FieldFormat -> FieldFormat
hPrintf :: HPrintfType r => Handle -> String -> r
printf :: PrintfType r => String -> r
class PrintfType t
class HPrintfType t
class PrintfArg a where
- formatArg :: a -> FieldFormatter
- parseFormat :: a -> ModifierParser
class IsChar c where
- toChar :: c -> Char
- fromChar :: Char -> c
data FormatAdjustment
- = LeftAdjust
- | ZeroPad
data FormatSign
- = SignPlus
- | SignSpace
data FieldFormat = FieldFormat {
- fmtWidth :: Maybe Int
- fmtPrecision :: Maybe Int
- fmtAdjust :: Maybe FormatAdjustment
- fmtSign :: Maybe FormatSign
- fmtAlternate :: Bool
- fmtModifiers :: String
- fmtChar :: Char
}
data FormatParse = FormatParse {
- fpModifiers :: String
- fpChar :: Char
- fpRest :: String
}
type FieldFormatter = FieldFormat -> ShowS
type ModifierParser = String -> FormatParse
traceMarkerIO :: String -> IO ()
traceMarker :: String -> a -> a
traceEventIO :: String -> IO ()
traceEvent :: String -> a -> a
traceStack :: String -> a -> a
traceShowM :: (Show a, Applicative f) => a -> f ()
traceM :: Applicative f => String -> f ()
traceShowId :: Show a => a -> a
traceShow :: Show a => a -> b -> b
traceId :: String -> String
putTraceMsg :: String -> IO ()
traceIO :: String -> IO ()
isSubsequenceOf :: Eq a => [a] -> [a] -> Bool
foldMapDefault :: (Traversable t, Monoid m) => (a -> m) -> t a -> m
fmapDefault :: Traversable t => (a -> b) -> t a -> t b
mapAccumR :: Traversable t => (a -> b -> (a, c)) -> a -> t b -> (a, t c)
mapAccumL :: Traversable t => (a -> b -> (a, c)) -> a -> t b -> (a, t c)
minimumBy :: Foldable t => (a -> a -> Ordering) -> t a -> a
maximumBy :: Foldable t => (a -> a -> Ordering) -> t a -> a
asum :: (Foldable t, Alternative f) => t (f a) -> f a
sequenceA_ :: (Foldable t, Applicative f) => t (f a) -> f ()
foldlM :: (Foldable t, Monad m) => (b -> a -> m b) -> b -> t a -> m b
foldrM :: (Foldable t, Monad m) => (a -> b -> m b) -> b -> t a -> m b
stimesMonoid :: (Integral b, Monoid a) => b -> a -> a
stimesIdempotent :: Integral b => b -> a -> a
newtype Dual a = Dual {
- getDual :: a
}
newtype Endo a = Endo {
- appEndo :: a -> a
}
newtype Sum a = Sum {
- getSum :: a
}
newtype Product a = Product {
- getProduct :: a
}
sortOn :: Ord b => (a -> b) -> [a] -> [a]
permutations :: [a] -> [[a]]
subsequences :: [a] -> [[a]]
tails :: [a] -> [[a]]
inits :: [a] -> [[a]]
groupBy :: (a -> a -> Bool) -> [a] -> [[a]]
group :: Eq a => [a] -> [[a]]
deleteFirstsBy :: (a -> a -> Bool) -> [a] -> [a] -> [a]
unzip7 :: [(a, b, c, d, e, f, g)] -> ([a], [b], [c], [d], [e], [f], [g])
unzip6 :: [(a, b, c, d, e, f)] -> ([a], [b], [c], [d], [e], [f])
unzip5 :: [(a, b, c, d, e)] -> ([a], [b], [c], [d], [e])
unzip4 :: [(a, b, c, d)] -> ([a], [b], [c], [d])
zipWith7 :: (a -> b -> c -> d -> e -> f -> g -> h) -> [a] -> [b] -> [c] -> [d] -> [e] -> [f] -> [g] -> [h]
zipWith6 :: (a -> b -> c -> d -> e -> f -> g) -> [a] -> [b] -> [c] -> [d] -> [e] -> [f] -> [g]
zipWith5 :: (a -> b -> c -> d -> e -> f) -> [a] -> [b] -> [c] -> [d] -> [e] -> [f]
zipWith4 :: (a -> b -> c -> d -> e) -> [a] -> [b] -> [c] -> [d] -> [e]
zip7 :: [a] -> [b] -> [c] -> [d] -> [e] -> [f] -> [g] -> [(a, b, c, d, e, f, g)]
zip6 :: [a] -> [b] -> [c] -> [d] -> [e] -> [f] -> [(a, b, c, d, e, f)]
zip5 :: [a] -> [b] -> [c] -> [d] -> [e] -> [(a, b, c, d, e)]
zip4 :: [a] -> [b] -> [c] -> [d] -> [(a, b, c, d)]
genericReplicate :: Integral i => i -> a -> [a]
genericIndex :: Integral i => [a] -> i -> a
genericSplitAt :: Integral i => i -> [a] -> ([a], [a])
genericDrop :: Integral i => i -> [a] -> [a]
genericTake :: Integral i => i -> [a] -> [a]
genericLength :: Num i => [a] -> i
insertBy :: (a -> a -> Ordering) -> a -> [a] -> [a]
insert :: Ord a => a -> [a] -> [a]
partition :: (a -> Bool) -> [a] -> ([a], [a])
transpose :: [[a]] -> [[a]]
intersectBy :: (a -> a -> Bool) -> [a] -> [a] -> [a]
intersect :: Eq a => [a] -> [a] -> [a]
unionBy :: (a -> a -> Bool) -> [a] -> [a] -> [a]
union :: Eq a => [a] -> [a] -> [a]
(\\) :: Eq a => [a] -> [a] -> [a]
deleteBy :: (a -> a -> Bool) -> a -> [a] -> [a]
delete :: Eq a => a -> [a] -> [a]
findIndices :: (a -> Bool) -> [a] -> [Int]
findIndex :: (a -> Bool) -> [a] -> Maybe Int
elemIndices :: Eq a => a -> [a] -> [Int]
elemIndex :: Eq a => a -> [a] -> Maybe Int
stripPrefix :: Eq a => [a] -> [a] -> Maybe [a]
dropWhileEnd :: (a -> Bool) -> [a] -> [a]
isSeparator :: Char -> Bool
isNumber :: Char -> Bool
isMark :: Char -> Bool
isLetter :: Char -> Bool
digitToInt :: Char -> Int
readLitChar :: ReadS Char
lexLitChar :: ReadS String
toTitle :: Char -> Char
isLower :: Char -> Bool
isPrint :: Char -> Bool
isControl :: Char -> Bool
isSymbol :: Char -> Bool
isPunctuation :: Char -> Bool
isHexDigit :: Char -> Bool
isOctDigit :: Char -> Bool
isAsciiUpper :: Char -> Bool
isAsciiLower :: Char -> Bool
isLatin1 :: Char -> Bool
isAscii :: Char -> Bool
generalCategory :: Char -> GeneralCategory
data GeneralCategory
- = UppercaseLetter
- | LowercaseLetter
- | TitlecaseLetter
- | ModifierLetter
- | OtherLetter
- | NonSpacingMark
- | SpacingCombiningMark
- | EnclosingMark
- | DecimalNumber
- | LetterNumber
- | OtherNumber
- | ConnectorPunctuation
- | DashPunctuation
- | OpenPunctuation
- | ClosePunctuation
- | InitialQuote
- | FinalQuote
- | OtherPunctuation
- | MathSymbol
- | CurrencySymbol
- | ModifierSymbol
- | OtherSymbol
- | Space
- | LineSeparator
- | ParagraphSeparator
- | Control
- | Format
- | Surrogate
- | PrivateUse
- | NotAssigned
(&) :: a -> (a -> b) -> b
on :: (b -> b -> c) -> (a -> b) -> a -> a -> c
intToDigit :: Int -> Char
showLitChar :: Char -> ShowS
iterate' :: (a -> a) -> a -> [a]
scanl' :: (b -> a -> b) -> b -> [a] -> [b]
foldl1' :: (a -> a -> a) -> [a] -> a
uncons :: [a] -> Maybe (a, [a])
fromJust :: Maybe a -> a
swap :: (a, b) -> (b, a)
stimesIdempotentMonoid :: (Integral b, Monoid a) => b -> a -> a
data IntMap a
data IntSet
rnf2 :: (NFData2 p, NFData a, NFData b) => p a b -> ()
rnf1 :: (NFData1 f, NFData a) => f a -> ()
rwhnf :: a -> ()
(<$!!>) :: (Monad m, NFData b) => (a -> b) -> m a -> m b
force :: NFData a => a -> a
($!!) :: NFData a => (a -> b) -> a -> b
deepseq :: NFData a => a -> b -> b
class NFData1 (f :: Type -> Type) where
- liftRnf :: (a -> ()) -> f a -> ()
class NFData2 (p :: Type -> Type -> Type) where
- liftRnf2 :: (a -> ()) -> (b -> ()) -> p a b -> ()
class Profunctor (p :: Type -> Type -> Type) where
- dimap :: (a -> b) -> (c -> d) -> p b c -> p a d
- lmap :: (a -> b) -> p b c -> p a c
- rmap :: (b -> c) -> p a b -> p a c
data PointedList a
data ChallengeSpec = CS {
- _csDay :: Finite 25
- _csPart :: Char
}
type ChallengeMap = Map (Finite 25) (Map Char Challenge)
data ChallengeError
- = CEParse
- | CESolve
data Challenge where
- MkC :: {..} -> Challenge
withSolver' :: (String -> String) -> Challenge
withSolver :: (String -> Maybe String) -> Challenge
runChallenge :: Challenge -> String -> Either ChallengeError String
(!!!) :: [a] -> Int -> a
strip :: String -> String
iterateMaybe :: (a -> Maybe a) -> a -> [a]
dup :: a -> (a, a)
scanlT :: Traversable t => (b -> a -> b) -> b -> t a -> t b
scanrT :: Traversable t => (a -> b -> b) -> b -> t a -> t b
eitherToMaybe :: Either e a -> Maybe a
maybeToEither :: e -> Maybe a -> Either e a
firstRepeated :: Ord a => [a] -> Maybe a

Documentation

(++) :: [a] -> [a] -> [a] infixr 5 #

Append two lists, i.e.,

[x1, ..., xm] ++ [y1, ..., yn] == [x1, ..., xm, y1, ..., yn]
[x1, ..., xm] ++ [y1, ...] == [x1, ..., xm, y1, ...]

If the first list is not finite, the result is the first list.

filter :: (a -> Bool) -> [a] -> [a] #

filter, applied to a predicate and a list, returns the list of those elements that satisfy the predicate; i.e.,

filter p xs = [ x | x <- xs, p x]

zip :: [a] -> [b] -> [(a, b)] #

zip takes two lists and returns a list of corresponding pairs.

zip [1, 2] ['a', 'b'] = [(1, 'a'), (2, 'b')]

If one input list is short, excess elements of the longer list are discarded:

zip [1] ['a', 'b'] = [(1, 'a')]
zip [1, 2] ['a'] = [(1, 'a')]

zip is right-lazy:

zip [] _|_ = []
zip _|_ [] = _|_

fst :: (a, b) -> a #

Extract the first component of a pair.

snd :: (a, b) -> b #

Extract the second component of a pair.

trace :: String -> a -> a #

The trace function outputs the trace message given as its first argument, before returning the second argument as its result.

For example, this returns the value of f x but first outputs the message.

>>> let x = 123; f = show
>>> trace ("calling f with x = " ++ show x) (f x)
"calling f with x = 123
123"

The trace function should only be used for debugging, or for monitoring execution. The function is not referentially transparent: its type indicates that it is a pure function but it has the side effect of outputting the trace message.

map :: (a -> b) -> [a] -> [b] #

map f xs is the list obtained by applying f to each element of xs, i.e.,

map f [x1, x2, ..., xn] == [f x1, f x2, ..., f xn]
map f [x1, x2, ...] == [f x1, f x2, ...]

($) :: (a -> b) -> a -> b infixr 0 #

Application operator. This operator is redundant, since ordinary application (f x) means the same as (f $ x). However, $ has low, right-associative binding precedence, so it sometimes allows parentheses to be omitted; for example:

f $ g $ h x  =  f (g (h x))

It is also useful in higher-order situations, such as map ($ 0) xs, or zipWith ($) fs xs.

Note that ($) is levity-polymorphic in its result type, so that foo $ True where foo :: Bool -> Int# is well-typed

guard :: Alternative f => Bool -> f () #

Conditional failure of Alternative computations. Defined by

guard True  = pure ()
guard False = empty

Examples

Expand

Common uses of guard include conditionally signaling an error in an error monad and conditionally rejecting the current choice in an Alternative-based parser.

As an example of signaling an error in the error monad Maybe, consider a safe division function safeDiv x y that returns Nothing when the denominator y is zero and Just (x `div` y) otherwise. For example:

>>> safeDiv 4 0
Nothing
>>> safeDiv 4 2
Just 2

A definition of safeDiv using guards, but not guard:

safeDiv :: Int -> Int -> Maybe Int
safeDiv x y | y /= 0    = Just (x `div` y)
            | otherwise = Nothing

A definition of safeDiv using guard and Monad do-notation:

safeDiv :: Int -> Int -> Maybe Int
safeDiv x y = do
  guard (y /= 0)
  return (x `div` y)

join :: Monad m => m (m a) -> m a #

The join function is the conventional monad join operator. It is used to remove one level of monadic structure, projecting its bound argument into the outer level.

Examples

Expand

A common use of join is to run an IO computation returned from an STM transaction, since STM transactions can't perform IO directly. Recall that

atomically :: STM a -> IO a

is used to run STM transactions atomically. So, by specializing the types of atomically and join to

atomically :: STM (IO b) -> IO (IO b)
join       :: IO (IO b)  -> IO b

we can compose them as

join . atomically :: STM (IO b) -> IO b

to run an STM transaction and the IO action it returns.

class Applicative m => Monad (m :: Type -> Type) where #

The Monad class defines the basic operations over a monad, a concept from a branch of mathematics known as category theory. From the perspective of a Haskell programmer, however, it is best to think of a monad as an abstract datatype of actions. Haskell's do expressions provide a convenient syntax for writing monadic expressions.

Instances of Monad should satisfy the following laws:

```
return a >>= k  =  k a
```
```
m >>= return  =  m
```

m >>= (\x -> k x >>= h)  =  (m >>= k) >>= h

Furthermore, the Monad and Applicative operations should relate as follows:

```
pure = return
```
```
(<*>) = ap
```

The above laws imply:

```
fmap f xs  =  xs >>= return . f
```
```
(>>) = (*>)
```

and that pure and (<*>) satisfy the applicative functor laws.

The instances of Monad for lists, Maybe and IO defined in the Prelude satisfy these laws.

Minimal complete definition

(>>=)

Methods

(>>=) :: m a -> (a -> m b) -> m b infixl 1 #

Sequentially compose two actions, passing any value produced by the first as an argument to the second.

(>>) :: m a -> m b -> m b infixl 1 #

Sequentially compose two actions, discarding any value produced by the first, like sequencing operators (such as the semicolon) in imperative languages.

return :: a -> m a #

Inject a value into the monadic type.

Instances

Monad []	Since: base-2.1
Instance details Defined in GHC.Base Methods (>>=) :: [a] -> (a -> [b]) -> [b] # (>>) :: [a] -> [b] -> [b] # return :: a -> [a] # fail :: String -> [a] #
Monad Maybe	Since: base-2.1
Instance details Defined in GHC.Base Methods (>>=) :: Maybe a -> (a -> Maybe b) -> Maybe b # (>>) :: Maybe a -> Maybe b -> Maybe b # return :: a -> Maybe a # fail :: String -> Maybe a #
Monad IO	Since: base-2.1
Instance details Defined in GHC.Base Methods (>>=) :: IO a -> (a -> IO b) -> IO b # (>>) :: IO a -> IO b -> IO b # return :: a -> IO a # fail :: String -> IO a #
Monad Par1	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods (>>=) :: Par1 a -> (a -> Par1 b) -> Par1 b # (>>) :: Par1 a -> Par1 b -> Par1 b # return :: a -> Par1 a # fail :: String -> Par1 a #
Monad Q
Instance details Defined in Language.Haskell.TH.Syntax Methods (>>=) :: Q a -> (a -> Q b) -> Q b # (>>) :: Q a -> Q b -> Q b # return :: a -> Q a # fail :: String -> Q a #
Monad Last	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (>>=) :: Last a -> (a -> Last b) -> Last b # (>>) :: Last a -> Last b -> Last b # return :: a -> Last a # fail :: String -> Last a #
Monad Identity	Since: base-4.8.0.0
Instance details Defined in Data.Functor.Identity Methods (>>=) :: Identity a -> (a -> Identity b) -> Identity b # (>>) :: Identity a -> Identity b -> Identity b # return :: a -> Identity a # fail :: String -> Identity a #
Monad IResult
Instance details Defined in Data.Aeson.Types.Internal Methods (>>=) :: IResult a -> (a -> IResult b) -> IResult b # (>>) :: IResult a -> IResult b -> IResult b # return :: a -> IResult a # fail :: String -> IResult a #
Monad Result
Instance details Defined in Data.Aeson.Types.Internal Methods (>>=) :: Result a -> (a -> Result b) -> Result b # (>>) :: Result a -> Result b -> Result b # return :: a -> Result a # fail :: String -> Result a #
Monad Parser
Instance details Defined in Data.Aeson.Types.Internal Methods (>>=) :: Parser a -> (a -> Parser b) -> Parser b # (>>) :: Parser a -> Parser b -> Parser b # return :: a -> Parser a # fail :: String -> Parser a #
Monad Complex	Since: base-4.9.0.0
Instance details Defined in Data.Complex Methods (>>=) :: Complex a -> (a -> Complex b) -> Complex b # (>>) :: Complex a -> Complex b -> Complex b # return :: a -> Complex a # fail :: String -> Complex a #
Monad Min	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (>>=) :: Min a -> (a -> Min b) -> Min b # (>>) :: Min a -> Min b -> Min b # return :: a -> Min a # fail :: String -> Min a #
Monad Max	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (>>=) :: Max a -> (a -> Max b) -> Max b # (>>) :: Max a -> Max b -> Max b # return :: a -> Max a # fail :: String -> Max a #
Monad First	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (>>=) :: First a -> (a -> First b) -> First b # (>>) :: First a -> First b -> First b # return :: a -> First a # fail :: String -> First a #
Monad Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (>>=) :: Option a -> (a -> Option b) -> Option b # (>>) :: Option a -> Option b -> Option b # return :: a -> Option a # fail :: String -> Option a #
Monad First	Since: base-4.8.0.0
Instance details Defined in Data.Monoid Methods (>>=) :: First a -> (a -> First b) -> First b # (>>) :: First a -> First b -> First b # return :: a -> First a # fail :: String -> First a #
Monad Last	Since: base-4.8.0.0
Instance details Defined in Data.Monoid Methods (>>=) :: Last a -> (a -> Last b) -> Last b # (>>) :: Last a -> Last b -> Last b # return :: a -> Last a # fail :: String -> Last a #
Monad Dual	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods (>>=) :: Dual a -> (a -> Dual b) -> Dual b # (>>) :: Dual a -> Dual b -> Dual b # return :: a -> Dual a # fail :: String -> Dual a #
Monad Sum	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods (>>=) :: Sum a -> (a -> Sum b) -> Sum b # (>>) :: Sum a -> Sum b -> Sum b # return :: a -> Sum a # fail :: String -> Sum a #
Monad Product	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods (>>=) :: Product a -> (a -> Product b) -> Product b # (>>) :: Product a -> Product b -> Product b # return :: a -> Product a # fail :: String -> Product a #
Monad Down	Since: base-4.11.0.0
Instance details Defined in Data.Ord Methods (>>=) :: Down a -> (a -> Down b) -> Down b # (>>) :: Down a -> Down b -> Down b # return :: a -> Down a # fail :: String -> Down a #
Monad ReadP	Since: base-2.1
Instance details Defined in Text.ParserCombinators.ReadP Methods (>>=) :: ReadP a -> (a -> ReadP b) -> ReadP b # (>>) :: ReadP a -> ReadP b -> ReadP b # return :: a -> ReadP a # fail :: String -> ReadP a #
Monad NonEmpty	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods (>>=) :: NonEmpty a -> (a -> NonEmpty b) -> NonEmpty b # (>>) :: NonEmpty a -> NonEmpty b -> NonEmpty b # return :: a -> NonEmpty a # fail :: String -> NonEmpty a #
Monad Put
Instance details Defined in Data.ByteString.Builder.Internal Methods (>>=) :: Put a -> (a -> Put b) -> Put b # (>>) :: Put a -> Put b -> Put b # return :: a -> Put a # fail :: String -> Put a #
Monad Tree
Instance details Defined in Data.Tree Methods (>>=) :: Tree a -> (a -> Tree b) -> Tree b # (>>) :: Tree a -> Tree b -> Tree b # return :: a -> Tree a # fail :: String -> Tree a #
Monad Seq
Instance details Defined in Data.Sequence.Internal Methods (>>=) :: Seq a -> (a -> Seq b) -> Seq b # (>>) :: Seq a -> Seq b -> Seq b # return :: a -> Seq a # fail :: String -> Seq a #
Monad CryptoFailable
Instance details Defined in Crypto.Error.Types Methods (>>=) :: CryptoFailable a -> (a -> CryptoFailable b) -> CryptoFailable b # (>>) :: CryptoFailable a -> CryptoFailable b -> CryptoFailable b # return :: a -> CryptoFailable a # fail :: String -> CryptoFailable a #
Monad DList
Instance details Defined in Data.DList Methods (>>=) :: DList a -> (a -> DList b) -> DList b # (>>) :: DList a -> DList b -> DList b # return :: a -> DList a # fail :: String -> DList a #
Monad P
Instance details Defined in Language.Haskell.Exts.ParseMonad Methods (>>=) :: P a -> (a -> P b) -> P b # (>>) :: P a -> P b -> P b # return :: a -> P a # fail :: String -> P a #
Monad ParseResult
Instance details Defined in Language.Haskell.Exts.ParseMonad Methods (>>=) :: ParseResult a -> (a -> ParseResult b) -> ParseResult b # (>>) :: ParseResult a -> ParseResult b -> ParseResult b # return :: a -> ParseResult a # fail :: String -> ParseResult a #
Monad Vector
Instance details Defined in Data.Vector Methods (>>=) :: Vector a -> (a -> Vector b) -> Vector b # (>>) :: Vector a -> Vector b -> Vector b # return :: a -> Vector a # fail :: String -> Vector a #
Monad SmallArray
Instance details Defined in Data.Primitive.SmallArray Methods (>>=) :: SmallArray a -> (a -> SmallArray b) -> SmallArray b # (>>) :: SmallArray a -> SmallArray b -> SmallArray b # return :: a -> SmallArray a # fail :: String -> SmallArray a #
Monad Array
Instance details Defined in Data.Primitive.Array Methods (>>=) :: Array a -> (a -> Array b) -> Array b # (>>) :: Array a -> Array b -> Array b # return :: a -> Array a # fail :: String -> Array a #
Monad Stream
Instance details Defined in Codec.Compression.Zlib.Stream Methods (>>=) :: Stream a -> (a -> Stream b) -> Stream b # (>>) :: Stream a -> Stream b -> Stream b # return :: a -> Stream a # fail :: String -> Stream a #
Monad P	Since: base-2.1
Instance details Defined in Text.ParserCombinators.ReadP Methods (>>=) :: P a -> (a -> P b) -> P b # (>>) :: P a -> P b -> P b # return :: a -> P a # fail :: String -> P a #
Monad EP
Instance details Defined in Language.Haskell.Exts.ExactPrint Methods (>>=) :: EP a -> (a -> EP b) -> EP b # (>>) :: EP a -> EP b -> EP b # return :: a -> EP a # fail :: String -> EP a #
Monad (Either e)	Since: base-4.4.0.0
Instance details Defined in Data.Either Methods (>>=) :: Either e a -> (a -> Either e b) -> Either e b # (>>) :: Either e a -> Either e b -> Either e b # return :: a -> Either e a # fail :: String -> Either e a #
Monad (U1 :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods (>>=) :: U1 a -> (a -> U1 b) -> U1 b # (>>) :: U1 a -> U1 b -> U1 b # return :: a -> U1 a # fail :: String -> U1 a #
Monoid a => Monad ((,) a)	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods (>>=) :: (a, a0) -> (a0 -> (a, b)) -> (a, b) # (>>) :: (a, a0) -> (a, b) -> (a, b) # return :: a0 -> (a, a0) # fail :: String -> (a, a0) #
Monad m => Monad (WrappedMonad m)	Since: base-4.7.0.0
Instance details Defined in Control.Applicative Methods (>>=) :: WrappedMonad m a -> (a -> WrappedMonad m b) -> WrappedMonad m b # (>>) :: WrappedMonad m a -> WrappedMonad m b -> WrappedMonad m b # return :: a -> WrappedMonad m a # fail :: String -> WrappedMonad m a #
Monad (Parser i)
Instance details Defined in Data.Attoparsec.Internal.Types Methods (>>=) :: Parser i a -> (a -> Parser i b) -> Parser i b # (>>) :: Parser i a -> Parser i b -> Parser i b # return :: a -> Parser i a # fail :: String -> Parser i a #
Monad (Proxy :: Type -> Type)	Since: base-4.7.0.0
Instance details Defined in Data.Proxy Methods (>>=) :: Proxy a -> (a -> Proxy b) -> Proxy b # (>>) :: Proxy a -> Proxy b -> Proxy b # return :: a -> Proxy a # fail :: String -> Proxy a #
Monad m => Monad (ResourceT m)
Instance details Defined in Control.Monad.Trans.Resource.Internal Methods (>>=) :: ResourceT m a -> (a -> ResourceT m b) -> ResourceT m b # (>>) :: ResourceT m a -> ResourceT m b -> ResourceT m b # return :: a -> ResourceT m a # fail :: String -> ResourceT m a #
Monad (Lex r)
Instance details Defined in Language.Haskell.Exts.ParseMonad Methods (>>=) :: Lex r a -> (a -> Lex r b) -> Lex r b # (>>) :: Lex r a -> Lex r b -> Lex r b # return :: a -> Lex r a # fail :: String -> Lex r a #
Monad (DocM s)
Instance details Defined in Language.Haskell.Exts.Pretty Methods (>>=) :: DocM s a -> (a -> DocM s b) -> DocM s b # (>>) :: DocM s a -> DocM s b -> DocM s b # return :: a -> DocM s a # fail :: String -> DocM s a #
Monad (SetM s)
Instance details Defined in Data.Graph Methods (>>=) :: SetM s a -> (a -> SetM s b) -> SetM s b # (>>) :: SetM s a -> SetM s b -> SetM s b # return :: a -> SetM s a # fail :: String -> SetM s a #
Monad f => Monad (Rec1 f)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods (>>=) :: Rec1 f a -> (a -> Rec1 f b) -> Rec1 f b # (>>) :: Rec1 f a -> Rec1 f b -> Rec1 f b # return :: a -> Rec1 f a # fail :: String -> Rec1 f a #
Monad f => Monad (Ap f)	Since: base-4.12.0.0
Instance details Defined in Data.Monoid Methods (>>=) :: Ap f a -> (a -> Ap f b) -> Ap f b # (>>) :: Ap f a -> Ap f b -> Ap f b # return :: a -> Ap f a # fail :: String -> Ap f a #
Monad f => Monad (Alt f)	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods (>>=) :: Alt f a -> (a -> Alt f b) -> Alt f b # (>>) :: Alt f a -> Alt f b -> Alt f b # return :: a -> Alt f a # fail :: String -> Alt f a #
Monad m => Monad (ExceptT e m)
Instance details Defined in Control.Monad.Trans.Except Methods (>>=) :: ExceptT e m a -> (a -> ExceptT e m b) -> ExceptT e m b # (>>) :: ExceptT e m a -> ExceptT e m b -> ExceptT e m b # return :: a -> ExceptT e m a # fail :: String -> ExceptT e m a #
(Applicative f, Monad f) => Monad (WhenMissing f x)	Equivalent to `ReaderT k (ReaderT x (MaybeT f))`. Since: containers-0.5.9
Instance details Defined in Data.IntMap.Internal Methods (>>=) :: WhenMissing f x a -> (a -> WhenMissing f x b) -> WhenMissing f x b # (>>) :: WhenMissing f x a -> WhenMissing f x b -> WhenMissing f x b # return :: a -> WhenMissing f x a # fail :: String -> WhenMissing f x a #
(Monad m, Error e) => Monad (ErrorT e m)
Instance details Defined in Control.Monad.Trans.Error Methods (>>=) :: ErrorT e m a -> (a -> ErrorT e m b) -> ErrorT e m b # (>>) :: ErrorT e m a -> ErrorT e m b -> ErrorT e m b # return :: a -> ErrorT e m a # fail :: String -> ErrorT e m a #
Monad (Tagged s)
Instance details Defined in Data.Tagged Methods (>>=) :: Tagged s a -> (a -> Tagged s b) -> Tagged s b # (>>) :: Tagged s a -> Tagged s b -> Tagged s b # return :: a -> Tagged s a # fail :: String -> Tagged s a #
Monad ((->) r :: Type -> Type)	Since: base-2.1
Instance details Defined in GHC.Base Methods (>>=) :: (r -> a) -> (a -> r -> b) -> r -> b # (>>) :: (r -> a) -> (r -> b) -> r -> b # return :: a -> r -> a # fail :: String -> r -> a #
(Monad f, Monad g) => Monad (f :*: g)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods (>>=) :: (f :: g) a -> (a -> (f :: g) b) -> (f :: g) b # (>>) :: (f :: g) a -> (f :: g) b -> (f :: g) b # return :: a -> (f :: g) a # fail :: String -> (f :: g) a #
(Monad f, Monad g) => Monad (Product f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Product Methods (>>=) :: Product f g a -> (a -> Product f g b) -> Product f g b # (>>) :: Product f g a -> Product f g b -> Product f g b # return :: a -> Product f g a # fail :: String -> Product f g a #
Monad (ConduitT i o m)
Instance details Defined in Data.Conduit.Internal.Conduit Methods (>>=) :: ConduitT i o m a -> (a -> ConduitT i o m b) -> ConduitT i o m b # (>>) :: ConduitT i o m a -> ConduitT i o m b -> ConduitT i o m b # return :: a -> ConduitT i o m a # fail :: String -> ConduitT i o m a #
(Monad f, Applicative f) => Monad (WhenMatched f x y)	Equivalent to `ReaderT Key (ReaderT x (ReaderT y (MaybeT f)))` Since: containers-0.5.9
Instance details Defined in Data.IntMap.Internal Methods (>>=) :: WhenMatched f x y a -> (a -> WhenMatched f x y b) -> WhenMatched f x y b # (>>) :: WhenMatched f x y a -> WhenMatched f x y b -> WhenMatched f x y b # return :: a -> WhenMatched f x y a # fail :: String -> WhenMatched f x y a #
(Applicative f, Monad f) => Monad (WhenMissing f k x)	Equivalent to `ReaderT k (ReaderT x (MaybeT f))` . Since: containers-0.5.9
Instance details Defined in Data.Map.Internal Methods (>>=) :: WhenMissing f k x a -> (a -> WhenMissing f k x b) -> WhenMissing f k x b # (>>) :: WhenMissing f k x a -> WhenMissing f k x b -> WhenMissing f k x b # return :: a -> WhenMissing f k x a # fail :: String -> WhenMissing f k x a #
Stream s => Monad (ParsecT e s m)	`return` returns a parser that succeeds without consuming input.
Instance details Defined in Text.Megaparsec.Internal Methods (>>=) :: ParsecT e s m a -> (a -> ParsecT e s m b) -> ParsecT e s m b # (>>) :: ParsecT e s m a -> ParsecT e s m b -> ParsecT e s m b # return :: a -> ParsecT e s m a # fail :: String -> ParsecT e s m a #
Monad f => Monad (M1 i c f)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods (>>=) :: M1 i c f a -> (a -> M1 i c f b) -> M1 i c f b # (>>) :: M1 i c f a -> M1 i c f b -> M1 i c f b # return :: a -> M1 i c f a # fail :: String -> M1 i c f a #
(Monad f, Applicative f) => Monad (WhenMatched f k x y)	Equivalent to `ReaderT k (ReaderT x (ReaderT y (MaybeT f)))` Since: containers-0.5.9
Instance details Defined in Data.Map.Internal Methods (>>=) :: WhenMatched f k x y a -> (a -> WhenMatched f k x y b) -> WhenMatched f k x y b # (>>) :: WhenMatched f k x y a -> WhenMatched f k x y b -> WhenMatched f k x y b # return :: a -> WhenMatched f k x y a # fail :: String -> WhenMatched f k x y a #
Monad state => Monad (Builder collection mutCollection step state err)
Instance details Defined in Basement.MutableBuilder Methods (>>=) :: Builder collection mutCollection step state err a -> (a -> Builder collection mutCollection step state err b) -> Builder collection mutCollection step state err b # (>>) :: Builder collection mutCollection step state err a -> Builder collection mutCollection step state err b -> Builder collection mutCollection step state err b # return :: a -> Builder collection mutCollection step state err a # fail :: String -> Builder collection mutCollection step state err a #
Monad m => Monad (Pipe l i o u m)
Instance details Defined in Data.Conduit.Internal.Pipe Methods (>>=) :: Pipe l i o u m a -> (a -> Pipe l i o u m b) -> Pipe l i o u m b # (>>) :: Pipe l i o u m a -> Pipe l i o u m b -> Pipe l i o u m b # return :: a -> Pipe l i o u m a # fail :: String -> Pipe l i o u m a #

class Functor (f :: Type -> Type) where #

The Functor class is used for types that can be mapped over. Instances of Functor should satisfy the following laws:

fmap id  ==  id
fmap (f . g)  ==  fmap f . fmap g

The instances of Functor for lists, Maybe and IO satisfy these laws.

Minimal complete definition

fmap

Methods

fmap :: (a -> b) -> f a -> f b #

(<$) :: a -> f b -> f a infixl 4 #

Replace all locations in the input with the same value. The default definition is fmap . const, but this may be overridden with a more efficient version.

Instances

Functor []	Since: base-2.1
Instance details Defined in GHC.Base Methods fmap :: (a -> b) -> [a] -> [b] # (<$) :: a -> [b] -> [a] #
Functor Maybe	Since: base-2.1
Instance details Defined in GHC.Base Methods fmap :: (a -> b) -> Maybe a -> Maybe b # (<$) :: a -> Maybe b -> Maybe a #
Functor IO	Since: base-2.1
Instance details Defined in GHC.Base Methods fmap :: (a -> b) -> IO a -> IO b # (<$) :: a -> IO b -> IO a #
Functor Par1	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> Par1 a -> Par1 b # (<$) :: a -> Par1 b -> Par1 a #
Functor Q
Instance details Defined in Language.Haskell.TH.Syntax Methods fmap :: (a -> b) -> Q a -> Q b # (<$) :: a -> Q b -> Q a #
Functor Last	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fmap :: (a -> b) -> Last a -> Last b # (<$) :: a -> Last b -> Last a #
Functor VersionRangeF
Instance details Defined in Distribution.Types.VersionRange Methods fmap :: (a -> b) -> VersionRangeF a -> VersionRangeF b # (<$) :: a -> VersionRangeF b -> VersionRangeF a #
Functor Last'
Instance details Defined in Distribution.Compat.Semigroup Methods fmap :: (a -> b) -> Last' a -> Last' b # (<$) :: a -> Last' b -> Last' a #
Functor SCC	Since: containers-0.5.4
Instance details Defined in Data.Graph Methods fmap :: (a -> b) -> SCC a -> SCC b # (<$) :: a -> SCC b -> SCC a #
Functor Identity	Since: base-4.8.0.0
Instance details Defined in Data.Functor.Identity Methods fmap :: (a -> b) -> Identity a -> Identity b # (<$) :: a -> Identity b -> Identity a #
Functor ZipList	Since: base-2.1
Instance details Defined in Control.Applicative Methods fmap :: (a -> b) -> ZipList a -> ZipList b # (<$) :: a -> ZipList b -> ZipList a #
Functor FromJSONKeyFunction	Only law abiding up to interpretation
Instance details Defined in Data.Aeson.Types.FromJSON Methods fmap :: (a -> b) -> FromJSONKeyFunction a -> FromJSONKeyFunction b # (<$) :: a -> FromJSONKeyFunction b -> FromJSONKeyFunction a #
Functor IResult
Instance details Defined in Data.Aeson.Types.Internal Methods fmap :: (a -> b) -> IResult a -> IResult b # (<$) :: a -> IResult b -> IResult a #
Functor Result
Instance details Defined in Data.Aeson.Types.Internal Methods fmap :: (a -> b) -> Result a -> Result b # (<$) :: a -> Result b -> Result a #
Functor Parser
Instance details Defined in Data.Aeson.Types.Internal Methods fmap :: (a -> b) -> Parser a -> Parser b # (<$) :: a -> Parser b -> Parser a #
Functor Complex	Since: base-4.9.0.0
Instance details Defined in Data.Complex Methods fmap :: (a -> b) -> Complex a -> Complex b # (<$) :: a -> Complex b -> Complex a #
Functor Min	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fmap :: (a -> b) -> Min a -> Min b # (<$) :: a -> Min b -> Min a #
Functor Max	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fmap :: (a -> b) -> Max a -> Max b # (<$) :: a -> Max b -> Max a #
Functor First	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fmap :: (a -> b) -> First a -> First b # (<$) :: a -> First b -> First a #
Functor Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fmap :: (a -> b) -> Option a -> Option b # (<$) :: a -> Option b -> Option a #
Functor Handler	Since: base-4.6.0.0
Instance details Defined in Control.Exception Methods fmap :: (a -> b) -> Handler a -> Handler b # (<$) :: a -> Handler b -> Handler a #
Functor First	Since: base-4.8.0.0
Instance details Defined in Data.Monoid Methods fmap :: (a -> b) -> First a -> First b # (<$) :: a -> First b -> First a #
Functor Last	Since: base-4.8.0.0
Instance details Defined in Data.Monoid Methods fmap :: (a -> b) -> Last a -> Last b # (<$) :: a -> Last b -> Last a #
Functor Dual	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods fmap :: (a -> b) -> Dual a -> Dual b # (<$) :: a -> Dual b -> Dual a #
Functor Sum	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods fmap :: (a -> b) -> Sum a -> Sum b # (<$) :: a -> Sum b -> Sum a #
Functor Product	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods fmap :: (a -> b) -> Product a -> Product b # (<$) :: a -> Product b -> Product a #
Functor Down	Since: base-4.11.0.0
Instance details Defined in Data.Ord Methods fmap :: (a -> b) -> Down a -> Down b # (<$) :: a -> Down b -> Down a #
Functor ReadP	Since: base-2.1
Instance details Defined in Text.ParserCombinators.ReadP Methods fmap :: (a -> b) -> ReadP a -> ReadP b # (<$) :: a -> ReadP b -> ReadP a #
Functor NonEmpty	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods fmap :: (a -> b) -> NonEmpty a -> NonEmpty b # (<$) :: a -> NonEmpty b -> NonEmpty a #
Functor Put
Instance details Defined in Data.ByteString.Builder.Internal Methods fmap :: (a -> b) -> Put a -> Put b # (<$) :: a -> Put b -> Put a #
Functor Flush
Instance details Defined in Data.Conduit.Internal.Conduit Methods fmap :: (a -> b) -> Flush a -> Flush b # (<$) :: a -> Flush b -> Flush a #
Functor IntMap
Instance details Defined in Data.IntMap.Internal Methods fmap :: (a -> b) -> IntMap a -> IntMap b # (<$) :: a -> IntMap b -> IntMap a #
Functor Tree
Instance details Defined in Data.Tree Methods fmap :: (a -> b) -> Tree a -> Tree b # (<$) :: a -> Tree b -> Tree a #
Functor Seq
Instance details Defined in Data.Sequence.Internal Methods fmap :: (a -> b) -> Seq a -> Seq b # (<$) :: a -> Seq b -> Seq a #
Functor FingerTree
Instance details Defined in Data.Sequence.Internal Methods fmap :: (a -> b) -> FingerTree a -> FingerTree b # (<$) :: a -> FingerTree b -> FingerTree a #
Functor Digit
Instance details Defined in Data.Sequence.Internal Methods fmap :: (a -> b) -> Digit a -> Digit b # (<$) :: a -> Digit b -> Digit a #
Functor Node
Instance details Defined in Data.Sequence.Internal Methods fmap :: (a -> b) -> Node a -> Node b # (<$) :: a -> Node b -> Node a #
Functor Elem
Instance details Defined in Data.Sequence.Internal Methods fmap :: (a -> b) -> Elem a -> Elem b # (<$) :: a -> Elem b -> Elem a #
Functor ViewL
Instance details Defined in Data.Sequence.Internal Methods fmap :: (a -> b) -> ViewL a -> ViewL b # (<$) :: a -> ViewL b -> ViewL a #
Functor ViewR
Instance details Defined in Data.Sequence.Internal Methods fmap :: (a -> b) -> ViewR a -> ViewR b # (<$) :: a -> ViewR b -> ViewR a #
Functor CryptoFailable
Instance details Defined in Crypto.Error.Types Methods fmap :: (a -> b) -> CryptoFailable a -> CryptoFailable b # (<$) :: a -> CryptoFailable b -> CryptoFailable a #
Functor DList
Instance details Defined in Data.DList Methods fmap :: (a -> b) -> DList a -> DList b # (<$) :: a -> DList b -> DList a #
Functor Name
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Name a -> Name b # (<$) :: a -> Name b -> Name a #
Functor Scoped
Instance details Defined in Language.Haskell.Names.Types Methods fmap :: (a -> b) -> Scoped a -> Scoped b # (<$) :: a -> Scoped b -> Scoped a #
Functor NameInfo
Instance details Defined in Language.Haskell.Names.Types Methods fmap :: (a -> b) -> NameInfo a -> NameInfo b # (<$) :: a -> NameInfo b -> NameInfo a #
Functor Error
Instance details Defined in Language.Haskell.Names.Types Methods fmap :: (a -> b) -> Error a -> Error b # (<$) :: a -> Error b -> Error a #
Functor P
Instance details Defined in Language.Haskell.Exts.ParseMonad Methods fmap :: (a -> b) -> P a -> P b # (<$) :: a -> P b -> P a #
Functor NonGreedy
Instance details Defined in Language.Haskell.Exts.Parser Methods fmap :: (a -> b) -> NonGreedy a -> NonGreedy b # (<$) :: a -> NonGreedy b -> NonGreedy a #
Functor ListOf
Instance details Defined in Language.Haskell.Exts.Parser Methods fmap :: (a -> b) -> ListOf a -> ListOf b # (<$) :: a -> ListOf b -> ListOf a #
Functor ParseResult
Instance details Defined in Language.Haskell.Exts.ParseMonad Methods fmap :: (a -> b) -> ParseResult a -> ParseResult b # (<$) :: a -> ParseResult b -> ParseResult a #
Functor ModuleName
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> ModuleName a -> ModuleName b # (<$) :: a -> ModuleName b -> ModuleName a #
Functor SpecialCon
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> SpecialCon a -> SpecialCon b # (<$) :: a -> SpecialCon b -> SpecialCon a #
Functor QName
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> QName a -> QName b # (<$) :: a -> QName b -> QName a #
Functor IPName
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> IPName a -> IPName b # (<$) :: a -> IPName b -> IPName a #
Functor QOp
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> QOp a -> QOp b # (<$) :: a -> QOp b -> QOp a #
Functor Op
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Op a -> Op b # (<$) :: a -> Op b -> Op a #
Functor CName
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> CName a -> CName b # (<$) :: a -> CName b -> CName a #
Functor Module
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Module a -> Module b # (<$) :: a -> Module b -> Module a #
Functor ModuleHead
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> ModuleHead a -> ModuleHead b # (<$) :: a -> ModuleHead b -> ModuleHead a #
Functor ExportSpecList
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> ExportSpecList a -> ExportSpecList b # (<$) :: a -> ExportSpecList b -> ExportSpecList a #
Functor ExportSpec
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> ExportSpec a -> ExportSpec b # (<$) :: a -> ExportSpec b -> ExportSpec a #
Functor EWildcard
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> EWildcard a -> EWildcard b # (<$) :: a -> EWildcard b -> EWildcard a #
Functor Namespace
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Namespace a -> Namespace b # (<$) :: a -> Namespace b -> Namespace a #
Functor ImportDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> ImportDecl a -> ImportDecl b # (<$) :: a -> ImportDecl b -> ImportDecl a #
Functor ImportSpecList
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> ImportSpecList a -> ImportSpecList b # (<$) :: a -> ImportSpecList b -> ImportSpecList a #
Functor ImportSpec
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> ImportSpec a -> ImportSpec b # (<$) :: a -> ImportSpec b -> ImportSpec a #
Functor Assoc
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Assoc a -> Assoc b # (<$) :: a -> Assoc b -> Assoc a #
Functor Decl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Decl a -> Decl b # (<$) :: a -> Decl b -> Decl a #
Functor PatternSynDirection
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> PatternSynDirection a -> PatternSynDirection b # (<$) :: a -> PatternSynDirection b -> PatternSynDirection a #
Functor TypeEqn
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> TypeEqn a -> TypeEqn b # (<$) :: a -> TypeEqn b -> TypeEqn a #
Functor Annotation
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Annotation a -> Annotation b # (<$) :: a -> Annotation b -> Annotation a #
Functor BooleanFormula
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> BooleanFormula a -> BooleanFormula b # (<$) :: a -> BooleanFormula b -> BooleanFormula a #
Functor Role
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Role a -> Role b # (<$) :: a -> Role b -> Role a #
Functor DataOrNew
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> DataOrNew a -> DataOrNew b # (<$) :: a -> DataOrNew b -> DataOrNew a #
Functor InjectivityInfo
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> InjectivityInfo a -> InjectivityInfo b # (<$) :: a -> InjectivityInfo b -> InjectivityInfo a #
Functor ResultSig
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> ResultSig a -> ResultSig b # (<$) :: a -> ResultSig b -> ResultSig a #
Functor DeclHead
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> DeclHead a -> DeclHead b # (<$) :: a -> DeclHead b -> DeclHead a #
Functor InstRule
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> InstRule a -> InstRule b # (<$) :: a -> InstRule b -> InstRule a #
Functor InstHead
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> InstHead a -> InstHead b # (<$) :: a -> InstHead b -> InstHead a #
Functor Deriving
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Deriving a -> Deriving b # (<$) :: a -> Deriving b -> Deriving a #
Functor DerivStrategy
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> DerivStrategy a -> DerivStrategy b # (<$) :: a -> DerivStrategy b -> DerivStrategy a #
Functor Binds
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Binds a -> Binds b # (<$) :: a -> Binds b -> Binds a #
Functor IPBind
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> IPBind a -> IPBind b # (<$) :: a -> IPBind b -> IPBind a #
Functor Match
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Match a -> Match b # (<$) :: a -> Match b -> Match a #
Functor QualConDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> QualConDecl a -> QualConDecl b # (<$) :: a -> QualConDecl b -> QualConDecl a #
Functor ConDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> ConDecl a -> ConDecl b # (<$) :: a -> ConDecl b -> ConDecl a #
Functor FieldDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> FieldDecl a -> FieldDecl b # (<$) :: a -> FieldDecl b -> FieldDecl a #
Functor GadtDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> GadtDecl a -> GadtDecl b # (<$) :: a -> GadtDecl b -> GadtDecl a #
Functor ClassDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> ClassDecl a -> ClassDecl b # (<$) :: a -> ClassDecl b -> ClassDecl a #
Functor InstDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> InstDecl a -> InstDecl b # (<$) :: a -> InstDecl b -> InstDecl a #
Functor BangType
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> BangType a -> BangType b # (<$) :: a -> BangType b -> BangType a #
Functor Unpackedness
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Unpackedness a -> Unpackedness b # (<$) :: a -> Unpackedness b -> Unpackedness a #
Functor Rhs
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Rhs a -> Rhs b # (<$) :: a -> Rhs b -> Rhs a #
Functor GuardedRhs
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> GuardedRhs a -> GuardedRhs b # (<$) :: a -> GuardedRhs b -> GuardedRhs a #
Functor Type
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Type a -> Type b # (<$) :: a -> Type b -> Type a #
Functor MaybePromotedName
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> MaybePromotedName a -> MaybePromotedName b # (<$) :: a -> MaybePromotedName b -> MaybePromotedName a #
Functor Promoted
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Promoted a -> Promoted b # (<$) :: a -> Promoted b -> Promoted a #
Functor TyVarBind
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> TyVarBind a -> TyVarBind b # (<$) :: a -> TyVarBind b -> TyVarBind a #
Functor Kind
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Kind a -> Kind b # (<$) :: a -> Kind b -> Kind a #
Functor FunDep
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> FunDep a -> FunDep b # (<$) :: a -> FunDep b -> FunDep a #
Functor Context
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Context a -> Context b # (<$) :: a -> Context b -> Context a #
Functor Asst
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Asst a -> Asst b # (<$) :: a -> Asst b -> Asst a #
Functor Literal
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Literal a -> Literal b # (<$) :: a -> Literal b -> Literal a #
Functor Sign
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Sign a -> Sign b # (<$) :: a -> Sign b -> Sign a #
Functor Exp
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Exp a -> Exp b # (<$) :: a -> Exp b -> Exp a #
Functor XName
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> XName a -> XName b # (<$) :: a -> XName b -> XName a #
Functor XAttr
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> XAttr a -> XAttr b # (<$) :: a -> XAttr b -> XAttr a #
Functor Bracket
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Bracket a -> Bracket b # (<$) :: a -> Bracket b -> Bracket a #
Functor Splice
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Splice a -> Splice b # (<$) :: a -> Splice b -> Splice a #
Functor Safety
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Safety a -> Safety b # (<$) :: a -> Safety b -> Safety a #
Functor CallConv
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> CallConv a -> CallConv b # (<$) :: a -> CallConv b -> CallConv a #
Functor ModulePragma
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> ModulePragma a -> ModulePragma b # (<$) :: a -> ModulePragma b -> ModulePragma a #
Functor Overlap
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Overlap a -> Overlap b # (<$) :: a -> Overlap b -> Overlap a #
Functor Activation
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Activation a -> Activation b # (<$) :: a -> Activation b -> Activation a #
Functor Rule
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Rule a -> Rule b # (<$) :: a -> Rule b -> Rule a #
Functor RuleVar
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> RuleVar a -> RuleVar b # (<$) :: a -> RuleVar b -> RuleVar a #
Functor WarningText
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> WarningText a -> WarningText b # (<$) :: a -> WarningText b -> WarningText a #
Functor Pat
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Pat a -> Pat b # (<$) :: a -> Pat b -> Pat a #
Functor PXAttr
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> PXAttr a -> PXAttr b # (<$) :: a -> PXAttr b -> PXAttr a #
Functor RPatOp
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> RPatOp a -> RPatOp b # (<$) :: a -> RPatOp b -> RPatOp a #
Functor RPat
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> RPat a -> RPat b # (<$) :: a -> RPat b -> RPat a #
Functor PatField
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> PatField a -> PatField b # (<$) :: a -> PatField b -> PatField a #
Functor Stmt
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Stmt a -> Stmt b # (<$) :: a -> Stmt b -> Stmt a #
Functor QualStmt
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> QualStmt a -> QualStmt b # (<$) :: a -> QualStmt b -> QualStmt a #
Functor FieldUpdate
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> FieldUpdate a -> FieldUpdate b # (<$) :: a -> FieldUpdate b -> FieldUpdate a #
Functor Alt
Instance details Defined in Language.Haskell.Exts.Syntax Methods fmap :: (a -> b) -> Alt a -> Alt b # (<$) :: a -> Alt b -> Alt a #
Functor List
Instance details Defined in Data.Aeson.Config.Types Methods fmap :: (a -> b) -> List a -> List b # (<$) :: a -> List b -> List a #
Functor Section
Instance details Defined in Hpack.Config Methods fmap :: (a -> b) -> Section a -> Section b # (<$) :: a -> Section b -> Section a #
Functor Conditional
Instance details Defined in Hpack.Config Methods fmap :: (a -> b) -> Conditional a -> Conditional b # (<$) :: a -> Conditional b -> Conditional a #
Functor HistoriedResponse
Instance details Defined in Network.HTTP.Client Methods fmap :: (a -> b) -> HistoriedResponse a -> HistoriedResponse b # (<$) :: a -> HistoriedResponse b -> HistoriedResponse a #
Functor Response
Instance details Defined in Network.HTTP.Client.Types Methods fmap :: (a -> b) -> Response a -> Response b # (<$) :: a -> Response b -> Response a #
Functor Vector
Instance details Defined in Data.Vector Methods fmap :: (a -> b) -> Vector a -> Vector b # (<$) :: a -> Vector b -> Vector a #
Functor ErrorItem
Instance details Defined in Text.Megaparsec.Error Methods fmap :: (a -> b) -> ErrorItem a -> ErrorItem b # (<$) :: a -> ErrorItem b -> ErrorItem a #
Functor ErrorFancy
Instance details Defined in Text.Megaparsec.Error Methods fmap :: (a -> b) -> ErrorFancy a -> ErrorFancy b # (<$) :: a -> ErrorFancy b -> ErrorFancy a #
Functor PointedList
Instance details Defined in Data.List.PointedList Methods fmap :: (a -> b) -> PointedList a -> PointedList b # (<$) :: a -> PointedList b -> PointedList a #
Functor Doc
Instance details Defined in Text.PrettyPrint.Annotated.HughesPJ Methods fmap :: (a -> b) -> Doc a -> Doc b # (<$) :: a -> Doc b -> Doc a #
Functor AnnotDetails
Instance details Defined in Text.PrettyPrint.Annotated.HughesPJ Methods fmap :: (a -> b) -> AnnotDetails a -> AnnotDetails b # (<$) :: a -> AnnotDetails b -> AnnotDetails a #
Functor Span
Instance details Defined in Text.PrettyPrint.Annotated.HughesPJ Methods fmap :: (a -> b) -> Span a -> Span b # (<$) :: a -> Span b -> Span a #
Functor SmallArray
Instance details Defined in Data.Primitive.SmallArray Methods fmap :: (a -> b) -> SmallArray a -> SmallArray b # (<$) :: a -> SmallArray b -> SmallArray a #
Functor Array
Instance details Defined in Data.Primitive.Array Methods fmap :: (a -> b) -> Array a -> Array b # (<$) :: a -> Array b -> Array a #
Functor Stream
Instance details Defined in Codec.Compression.Zlib.Stream Methods fmap :: (a -> b) -> Stream a -> Stream b # (<$) :: a -> Stream b -> Stream a #
Functor P	Since: base-4.8.0.0
Instance details Defined in Text.ParserCombinators.ReadP Methods fmap :: (a -> b) -> P a -> P b # (<$) :: a -> P b -> P a #
Functor GuardedAlt
Instance details Defined in Language.Haskell.Exts.ExactPrint Methods fmap :: (a -> b) -> GuardedAlt a -> GuardedAlt b # (<$) :: a -> GuardedAlt b -> GuardedAlt a #
Functor GuardedAlts
Instance details Defined in Language.Haskell.Exts.ExactPrint Methods fmap :: (a -> b) -> GuardedAlts a -> GuardedAlts b # (<$) :: a -> GuardedAlts b -> GuardedAlts a #
Functor EP
Instance details Defined in Language.Haskell.Exts.ExactPrint Methods fmap :: (a -> b) -> EP a -> EP b # (<$) :: a -> EP b -> EP a #
Functor (Either a)	Since: base-3.0
Instance details Defined in Data.Either Methods fmap :: (a0 -> b) -> Either a a0 -> Either a b # (<$) :: a0 -> Either a b -> Either a a0 #
Functor (V1 :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> V1 a -> V1 b # (<$) :: a -> V1 b -> V1 a #
Functor (U1 :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> U1 a -> U1 b # (<$) :: a -> U1 b -> U1 a #
Functor ((,) a)	Since: base-2.1
Instance details Defined in GHC.Base Methods fmap :: (a0 -> b) -> (a, a0) -> (a, b) # (<$) :: a0 -> (a, b) -> (a, a0) #
Functor (Map k)
Instance details Defined in Data.Map.Internal Methods fmap :: (a -> b) -> Map k a -> Map k b # (<$) :: a -> Map k b -> Map k a #
Monad m => Functor (WrappedMonad m)	Since: base-2.1
Instance details Defined in Control.Applicative Methods fmap :: (a -> b) -> WrappedMonad m a -> WrappedMonad m b # (<$) :: a -> WrappedMonad m b -> WrappedMonad m a #
Functor (HashMap k)
Instance details Defined in Data.HashMap.Base Methods fmap :: (a -> b) -> HashMap k a -> HashMap k b # (<$) :: a -> HashMap k b -> HashMap k a #
Functor (IResult i)
Instance details Defined in Data.Attoparsec.Internal.Types Methods fmap :: (a -> b) -> IResult i a -> IResult i b # (<$) :: a -> IResult i b -> IResult i a #
Functor (Parser i)
Instance details Defined in Data.Attoparsec.Internal.Types Methods fmap :: (a -> b) -> Parser i a -> Parser i b # (<$) :: a -> Parser i b -> Parser i a #
Functor (Arg a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fmap :: (a0 -> b) -> Arg a a0 -> Arg a b # (<$) :: a0 -> Arg a b -> Arg a a0 #
Functor (Proxy :: Type -> Type)	Since: base-4.7.0.0
Instance details Defined in Data.Proxy Methods fmap :: (a -> b) -> Proxy a -> Proxy b # (<$) :: a -> Proxy b -> Proxy a #
Monad m => Functor (ZipSource m)
Instance details Defined in Data.Conduit.Internal.Conduit Methods fmap :: (a -> b) -> ZipSource m a -> ZipSource m b # (<$) :: a -> ZipSource m b -> ZipSource m a #
Functor m => Functor (ResourceT m)
Instance details Defined in Control.Monad.Trans.Resource.Internal Methods fmap :: (a -> b) -> ResourceT m a -> ResourceT m b # (<$) :: a -> ResourceT m b -> ResourceT m a #
Functor (Lex r)
Instance details Defined in Language.Haskell.Exts.ParseMonad Methods fmap :: (a -> b) -> Lex r a -> Lex r b # (<$) :: a -> Lex r b -> Lex r a #
Functor (DocM s)
Instance details Defined in Language.Haskell.Exts.Pretty Methods fmap :: (a -> b) -> DocM s a -> DocM s b # (<$) :: a -> DocM s b -> DocM s a #
Functor (Product a)
Instance details Defined in Data.Aeson.Config.Types Methods fmap :: (a0 -> b) -> Product a a0 -> Product a b # (<$) :: a0 -> Product a b -> Product a a0 #
Functor (SetM s)
Instance details Defined in Data.Graph Methods fmap :: (a -> b) -> SetM s a -> SetM s b # (<$) :: a -> SetM s b -> SetM s a #
Functor f => Functor (Rec1 f)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> Rec1 f a -> Rec1 f b # (<$) :: a -> Rec1 f b -> Rec1 f a #
Functor (URec Char :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> URec Char a -> URec Char b # (<$) :: a -> URec Char b -> URec Char a #
Functor (URec Double :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> URec Double a -> URec Double b # (<$) :: a -> URec Double b -> URec Double a #
Functor (URec Float :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> URec Float a -> URec Float b # (<$) :: a -> URec Float b -> URec Float a #
Functor (URec Int :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> URec Int a -> URec Int b # (<$) :: a -> URec Int b -> URec Int a #
Functor (URec Word :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> URec Word a -> URec Word b # (<$) :: a -> URec Word b -> URec Word a #
Functor (URec (Ptr ()) :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> URec (Ptr ()) a -> URec (Ptr ()) b # (<$) :: a -> URec (Ptr ()) b -> URec (Ptr ()) a #
Functor (Const m :: Type -> Type)	Since: base-2.1
Instance details Defined in Data.Functor.Const Methods fmap :: (a -> b) -> Const m a -> Const m b # (<$) :: a -> Const m b -> Const m a #
Arrow a => Functor (WrappedArrow a b)	Since: base-2.1
Instance details Defined in Control.Applicative Methods fmap :: (a0 -> b0) -> WrappedArrow a b a0 -> WrappedArrow a b b0 # (<$) :: a0 -> WrappedArrow a b b0 -> WrappedArrow a b a0 #
Functor f => Functor (Ap f)	Since: base-4.12.0.0
Instance details Defined in Data.Monoid Methods fmap :: (a -> b) -> Ap f a -> Ap f b # (<$) :: a -> Ap f b -> Ap f a #
Functor f => Functor (Alt f)	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods fmap :: (a -> b) -> Alt f a -> Alt f b # (<$) :: a -> Alt f b -> Alt f a #
Functor m => Functor (ExceptT e m)
Instance details Defined in Control.Monad.Trans.Except Methods fmap :: (a -> b) -> ExceptT e m a -> ExceptT e m b # (<$) :: a -> ExceptT e m b -> ExceptT e m a #
Monad m => Functor (ZipSink i m)
Instance details Defined in Data.Conduit.Internal.Conduit Methods fmap :: (a -> b) -> ZipSink i m a -> ZipSink i m b # (<$) :: a -> ZipSink i m b -> ZipSink i m a #
(Applicative f, Monad f) => Functor (WhenMissing f x)	Since: containers-0.5.9
Instance details Defined in Data.IntMap.Internal Methods fmap :: (a -> b) -> WhenMissing f x a -> WhenMissing f x b # (<$) :: a -> WhenMissing f x b -> WhenMissing f x a #
Functor m => Functor (ErrorT e m)
Instance details Defined in Control.Monad.Trans.Error Methods fmap :: (a -> b) -> ErrorT e m a -> ErrorT e m b # (<$) :: a -> ErrorT e m b -> ErrorT e m a #
Functor (Tagged s)
Instance details Defined in Data.Tagged Methods fmap :: (a -> b) -> Tagged s a -> Tagged s b # (<$) :: a -> Tagged s b -> Tagged s a #
Functor ((->) r :: Type -> Type)	Since: base-2.1
Instance details Defined in GHC.Base Methods fmap :: (a -> b) -> (r -> a) -> r -> b # (<$) :: a -> (r -> b) -> r -> a #
Functor (K1 i c :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> K1 i c a -> K1 i c b # (<$) :: a -> K1 i c b -> K1 i c a #
(Functor f, Functor g) => Functor (f :+: g)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> (f :+: g) a -> (f :+: g) b # (<$) :: a -> (f :+: g) b -> (f :+: g) a #
(Functor f, Functor g) => Functor (f :*: g)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> (f :: g) a -> (f :: g) b # (<$) :: a -> (f :: g) b -> (f :: g) a #
(Functor f, Functor g) => Functor (Product f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Product Methods fmap :: (a -> b) -> Product f g a -> Product f g b # (<$) :: a -> Product f g b -> Product f g a #
(Functor f, Functor g) => Functor (Sum f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Sum Methods fmap :: (a -> b) -> Sum f g a -> Sum f g b # (<$) :: a -> Sum f g b -> Sum f g a #
Functor (ConduitT i o m)
Instance details Defined in Data.Conduit.Internal.Conduit Methods fmap :: (a -> b) -> ConduitT i o m a -> ConduitT i o m b # (<$) :: a -> ConduitT i o m b -> ConduitT i o m a #
Functor (ZipConduit i o m)
Instance details Defined in Data.Conduit.Internal.Conduit Methods fmap :: (a -> b) -> ZipConduit i o m a -> ZipConduit i o m b # (<$) :: a -> ZipConduit i o m b -> ZipConduit i o m a #
Functor f => Functor (WhenMatched f x y)	Since: containers-0.5.9
Instance details Defined in Data.IntMap.Internal Methods fmap :: (a -> b) -> WhenMatched f x y a -> WhenMatched f x y b # (<$) :: a -> WhenMatched f x y b -> WhenMatched f x y a #
(Applicative f, Monad f) => Functor (WhenMissing f k x)	Since: containers-0.5.9
Instance details Defined in Data.Map.Internal Methods fmap :: (a -> b) -> WhenMissing f k x a -> WhenMissing f k x b # (<$) :: a -> WhenMissing f k x b -> WhenMissing f k x a #
Functor (ParsecT e s m)
Instance details Defined in Text.Megaparsec.Internal Methods fmap :: (a -> b) -> ParsecT e s m a -> ParsecT e s m b # (<$) :: a -> ParsecT e s m b -> ParsecT e s m a #
Functor (CommonOptions cSources cxxSources jsSources)
Instance details Defined in Hpack.Config Methods fmap :: (a -> b) -> CommonOptions cSources cxxSources jsSources a -> CommonOptions cSources cxxSources jsSources b # (<$) :: a -> CommonOptions cSources cxxSources jsSources b -> CommonOptions cSources cxxSources jsSources a #
Functor (ConditionalSection cSources cxxSources jsSources)
Instance details Defined in Hpack.Config Methods fmap :: (a -> b) -> ConditionalSection cSources cxxSources jsSources a -> ConditionalSection cSources cxxSources jsSources b # (<$) :: a -> ConditionalSection cSources cxxSources jsSources b -> ConditionalSection cSources cxxSources jsSources a #
Functor (ThenElse cSources cxxSources jsSources)
Instance details Defined in Hpack.Config Methods fmap :: (a -> b) -> ThenElse cSources cxxSources jsSources a -> ThenElse cSources cxxSources jsSources b # (<$) :: a -> ThenElse cSources cxxSources jsSources b -> ThenElse cSources cxxSources jsSources a #
Functor f => Functor (M1 i c f)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> M1 i c f a -> M1 i c f b # (<$) :: a -> M1 i c f b -> M1 i c f a #
(Functor f, Functor g) => Functor (f :.: g)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> (f :.: g) a -> (f :.: g) b # (<$) :: a -> (f :.: g) b -> (f :.: g) a #
(Functor f, Functor g) => Functor (Compose f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Compose Methods fmap :: (a -> b) -> Compose f g a -> Compose f g b # (<$) :: a -> Compose f g b -> Compose f g a #
Functor g => Functor (Joker g a)
Instance details Defined in Data.Bifunctor.Joker Methods fmap :: (a0 -> b) -> Joker g a a0 -> Joker g a b # (<$) :: a0 -> Joker g a b -> Joker g a a0 #
Functor (Clown f a :: Type -> Type)
Instance details Defined in Data.Bifunctor.Clown Methods fmap :: (a0 -> b) -> Clown f a a0 -> Clown f a b # (<$) :: a0 -> Clown f a b -> Clown f a a0 #
Functor f => Functor (WhenMatched f k x y)	Since: containers-0.5.9
Instance details Defined in Data.Map.Internal Methods fmap :: (a -> b) -> WhenMatched f k x y a -> WhenMatched f k x y b # (<$) :: a -> WhenMatched f k x y b -> WhenMatched f k x y a #
Monad state => Functor (Builder collection mutCollection step state err)
Instance details Defined in Basement.MutableBuilder Methods fmap :: (a -> b) -> Builder collection mutCollection step state err a -> Builder collection mutCollection step state err b # (<$) :: a -> Builder collection mutCollection step state err b -> Builder collection mutCollection step state err a #
Monad m => Functor (Pipe l i o u m)
Instance details Defined in Data.Conduit.Internal.Pipe Methods fmap :: (a -> b) -> Pipe l i o u m a -> Pipe l i o u m b # (<$) :: a -> Pipe l i o u m b -> Pipe l i o u m a #
(Functor f, Bifunctor p) => Functor (Tannen f p a)
Instance details Defined in Data.Bifunctor.Tannen Methods fmap :: (a0 -> b) -> Tannen f p a a0 -> Tannen f p a b # (<$) :: a0 -> Tannen f p a b -> Tannen f p a a0 #
(Bifunctor p, Functor g) => Functor (Biff p f g a)
Instance details Defined in Data.Bifunctor.Biff Methods fmap :: (a0 -> b) -> Biff p f g a a0 -> Biff p f g a b # (<$) :: a0 -> Biff p f g a b -> Biff p f g a a0 #

class Monad m => MonadFail (m :: Type -> Type) where #

When a value is bound in do-notation, the pattern on the left hand side of <- might not match. In this case, this class provides a function to recover.

A Monad without a MonadFail instance may only be used in conjunction with pattern that always match, such as newtypes, tuples, data types with only a single data constructor, and irrefutable patterns (~pat).

Instances of MonadFail should satisfy the following law: fail s should be a left zero for >>=,

fail s >>= f  =  fail s

If your Monad is also MonadPlus, a popular definition is

fail _ = mzero

Since: base-4.9.0.0

Methods

fail :: String -> m a #

Instances

MonadFail []	Since: base-4.9.0.0
Instance details Defined in Control.Monad.Fail Methods fail :: String -> [a] #
MonadFail Maybe	Since: base-4.9.0.0
Instance details Defined in Control.Monad.Fail Methods fail :: String -> Maybe a #
MonadFail IO	Since: base-4.9.0.0
Instance details Defined in Control.Monad.Fail Methods fail :: String -> IO a #
MonadFail Q
Instance details Defined in Language.Haskell.TH.Syntax Methods fail :: String -> Q a #
MonadFail IResult
Instance details Defined in Data.Aeson.Types.Internal Methods fail :: String -> IResult a #
MonadFail Result
Instance details Defined in Data.Aeson.Types.Internal Methods fail :: String -> Result a #
MonadFail Parser
Instance details Defined in Data.Aeson.Types.Internal Methods fail :: String -> Parser a #
MonadFail ReadP	Since: base-4.9.0.0
Instance details Defined in Text.ParserCombinators.ReadP Methods fail :: String -> ReadP a #
MonadFail P
Instance details Defined in Language.Haskell.Exts.ParseMonad Methods fail :: String -> P a #
MonadFail ParseResult
Instance details Defined in Language.Haskell.Exts.ParseMonad Methods fail :: String -> ParseResult a #
MonadFail P	Since: base-4.9.0.0
Instance details Defined in Text.ParserCombinators.ReadP Methods fail :: String -> P a #
MonadFail (Parser i)
Instance details Defined in Data.Attoparsec.Internal.Types Methods fail :: String -> Parser i a #
MonadFail m => MonadFail (ResourceT m)	Since: resourcet-1.2.2
Instance details Defined in Control.Monad.Trans.Resource.Internal Methods fail :: String -> ResourceT m a #
MonadFail (Lex r)
Instance details Defined in Language.Haskell.Exts.ParseMonad Methods fail :: String -> Lex r a #
MonadFail f => MonadFail (Ap f)	Since: base-4.12.0.0
Instance details Defined in Data.Monoid Methods fail :: String -> Ap f a #
MonadFail m => MonadFail (ExceptT e m)
Instance details Defined in Control.Monad.Trans.Except Methods fail :: String -> ExceptT e m a #
(Monad m, Error e) => MonadFail (ErrorT e m)
Instance details Defined in Control.Monad.Trans.Error Methods fail :: String -> ErrorT e m a #
MonadFail m => MonadFail (ConduitT i o m)	Since: conduit-1.3.1
Instance details Defined in Data.Conduit.Internal.Conduit Methods fail :: String -> ConduitT i o m a #
Stream s => MonadFail (ParsecT e s m)
Instance details Defined in Text.Megaparsec.Internal Methods fail :: String -> ParsecT e s m a #

class Functor f => Applicative (f :: Type -> Type) where #

A functor with application, providing operations to

embed pure expressions (pure), and
sequence computations and combine their results (<*> and liftA2).

A minimal complete definition must include implementations of pure and of either <*> or liftA2. If it defines both, then they must behave the same as their default definitions:

(<*>) = liftA2 id

liftA2 f x y = f <$> x <*> y

Further, any definition must satisfy the following:

identity

pure id <*> v = v

composition

pure (.) <*> u <*> v <*> w = u <*> (v <*> w)

homomorphism

pure f <*> pure x = pure (f x)

interchange

u <*> pure y = pure ($ y) <*> u

The other methods have the following default definitions, which may be overridden with equivalent specialized implementations:

```
u *> v = (id <$ u) <*> v
```
```
u <* v = liftA2 const u v
```

As a consequence of these laws, the Functor instance for f will satisfy

```
fmap f x = pure f <*> x
```

It may be useful to note that supposing

forall x y. p (q x y) = f x . g y

it follows from the above that

liftA2 p (liftA2 q u v) = liftA2 f u . liftA2 g v

If f is also a Monad, it should satisfy

```
pure = return
```
```
(<*>) = ap
```
```
(*>) = (>>)
```

(which implies that pure and <*> satisfy the applicative functor laws).

Minimal complete definition

pure, ((<*>) | liftA2)

Methods

pure :: a -> f a #

Lift a value.

(<*>) :: f (a -> b) -> f a -> f b infixl 4 #

Sequential application.

A few functors support an implementation of <*> that is more efficient than the default one.

liftA2 :: (a -> b -> c) -> f a -> f b -> f c #

Lift a binary function to actions.

Some functors support an implementation of liftA2 that is more efficient than the default one. In particular, if fmap is an expensive operation, it is likely better to use liftA2 than to fmap over the structure and then use <*>.

(*>) :: f a -> f b -> f b infixl 4 #

Sequence actions, discarding the value of the first argument.

(<*) :: f a -> f b -> f a infixl 4 #

Sequence actions, discarding the value of the second argument.

Instances

Applicative []	Since: base-2.1
Instance details Defined in GHC.Base Methods pure :: a -> [a] # (<>) :: [a -> b] -> [a] -> [b] # liftA2 :: (a -> b -> c) -> [a] -> [b] -> [c] # (>) :: [a] -> [b] -> [b] # (<*) :: [a] -> [b] -> [a] #
Applicative Maybe	Since: base-2.1
Instance details Defined in GHC.Base Methods pure :: a -> Maybe a # (<>) :: Maybe (a -> b) -> Maybe a -> Maybe b # liftA2 :: (a -> b -> c) -> Maybe a -> Maybe b -> Maybe c # (>) :: Maybe a -> Maybe b -> Maybe b # (<*) :: Maybe a -> Maybe b -> Maybe a #
Applicative IO	Since: base-2.1
Instance details Defined in GHC.Base Methods pure :: a -> IO a # (<>) :: IO (a -> b) -> IO a -> IO b # liftA2 :: (a -> b -> c) -> IO a -> IO b -> IO c # (>) :: IO a -> IO b -> IO b # (<*) :: IO a -> IO b -> IO a #
Applicative Par1	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods pure :: a -> Par1 a # (<>) :: Par1 (a -> b) -> Par1 a -> Par1 b # liftA2 :: (a -> b -> c) -> Par1 a -> Par1 b -> Par1 c # (>) :: Par1 a -> Par1 b -> Par1 b # (<*) :: Par1 a -> Par1 b -> Par1 a #
Applicative Q
Instance details Defined in Language.Haskell.TH.Syntax Methods pure :: a -> Q a # (<>) :: Q (a -> b) -> Q a -> Q b # liftA2 :: (a -> b -> c) -> Q a -> Q b -> Q c # (>) :: Q a -> Q b -> Q b # (<*) :: Q a -> Q b -> Q a #
Applicative Last	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods pure :: a -> Last a # (<>) :: Last (a -> b) -> Last a -> Last b # liftA2 :: (a -> b -> c) -> Last a -> Last b -> Last c # (>) :: Last a -> Last b -> Last b # (<*) :: Last a -> Last b -> Last a #
Applicative Last'
Instance details Defined in Distribution.Compat.Semigroup Methods pure :: a -> Last' a # (<>) :: Last' (a -> b) -> Last' a -> Last' b # liftA2 :: (a -> b -> c) -> Last' a -> Last' b -> Last' c # (>) :: Last' a -> Last' b -> Last' b # (<*) :: Last' a -> Last' b -> Last' a #
Applicative Identity	Since: base-4.8.0.0
Instance details Defined in Data.Functor.Identity Methods pure :: a -> Identity a # (<>) :: Identity (a -> b) -> Identity a -> Identity b # liftA2 :: (a -> b -> c) -> Identity a -> Identity b -> Identity c # (>) :: Identity a -> Identity b -> Identity b # (<*) :: Identity a -> Identity b -> Identity a #
Applicative ZipList	f '<$>' 'ZipList' xs1 '<>' ... '<>' 'ZipList' xsN = 'ZipList' (zipWithN f xs1 ... xsN) where `zipWithN` refers to the `zipWith` function of the appropriate arity (`zipWith`, `zipWith3`, `zipWith4`, ...). For example: (\a b c -> stimes c [a, b]) <$> ZipList "abcd" <> ZipList "567" <> ZipList [1..] = ZipList (zipWith3 (\a b c -> stimes c [a, b]) "abcd" "567" [1..]) = ZipList {getZipList = ["a5","b6b6","c7c7c7"]} Since: base-2.1
Instance details Defined in Control.Applicative Methods pure :: a -> ZipList a # (<>) :: ZipList (a -> b) -> ZipList a -> ZipList b # liftA2 :: (a -> b -> c) -> ZipList a -> ZipList b -> ZipList c # (>) :: ZipList a -> ZipList b -> ZipList b # (<*) :: ZipList a -> ZipList b -> ZipList a #
Applicative IResult
Instance details Defined in Data.Aeson.Types.Internal Methods pure :: a -> IResult a # (<>) :: IResult (a -> b) -> IResult a -> IResult b # liftA2 :: (a -> b -> c) -> IResult a -> IResult b -> IResult c # (>) :: IResult a -> IResult b -> IResult b # (<*) :: IResult a -> IResult b -> IResult a #
Applicative Result
Instance details Defined in Data.Aeson.Types.Internal Methods pure :: a -> Result a # (<>) :: Result (a -> b) -> Result a -> Result b # liftA2 :: (a -> b -> c) -> Result a -> Result b -> Result c # (>) :: Result a -> Result b -> Result b # (<*) :: Result a -> Result b -> Result a #
Applicative Parser
Instance details Defined in Data.Aeson.Types.Internal Methods pure :: a -> Parser a # (<>) :: Parser (a -> b) -> Parser a -> Parser b # liftA2 :: (a -> b -> c) -> Parser a -> Parser b -> Parser c # (>) :: Parser a -> Parser b -> Parser b # (<*) :: Parser a -> Parser b -> Parser a #
Applicative Complex	Since: base-4.9.0.0
Instance details Defined in Data.Complex Methods pure :: a -> Complex a # (<>) :: Complex (a -> b) -> Complex a -> Complex b # liftA2 :: (a -> b -> c) -> Complex a -> Complex b -> Complex c # (>) :: Complex a -> Complex b -> Complex b # (<*) :: Complex a -> Complex b -> Complex a #
Applicative Min	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods pure :: a -> Min a # (<>) :: Min (a -> b) -> Min a -> Min b # liftA2 :: (a -> b -> c) -> Min a -> Min b -> Min c # (>) :: Min a -> Min b -> Min b # (<*) :: Min a -> Min b -> Min a #
Applicative Max	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods pure :: a -> Max a # (<>) :: Max (a -> b) -> Max a -> Max b # liftA2 :: (a -> b -> c) -> Max a -> Max b -> Max c # (>) :: Max a -> Max b -> Max b # (<*) :: Max a -> Max b -> Max a #
Applicative First	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods pure :: a -> First a # (<>) :: First (a -> b) -> First a -> First b # liftA2 :: (a -> b -> c) -> First a -> First b -> First c # (>) :: First a -> First b -> First b # (<*) :: First a -> First b -> First a #
Applicative Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods pure :: a -> Option a # (<>) :: Option (a -> b) -> Option a -> Option b # liftA2 :: (a -> b -> c) -> Option a -> Option b -> Option c # (>) :: Option a -> Option b -> Option b # (<*) :: Option a -> Option b -> Option a #
Applicative First	Since: base-4.8.0.0
Instance details Defined in Data.Monoid Methods pure :: a -> First a # (<>) :: First (a -> b) -> First a -> First b # liftA2 :: (a -> b -> c) -> First a -> First b -> First c # (>) :: First a -> First b -> First b # (<*) :: First a -> First b -> First a #
Applicative Last	Since: base-4.8.0.0
Instance details Defined in Data.Monoid Methods pure :: a -> Last a # (<>) :: Last (a -> b) -> Last a -> Last b # liftA2 :: (a -> b -> c) -> Last a -> Last b -> Last c # (>) :: Last a -> Last b -> Last b # (<*) :: Last a -> Last b -> Last a #
Applicative Dual	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods pure :: a -> Dual a # (<>) :: Dual (a -> b) -> Dual a -> Dual b # liftA2 :: (a -> b -> c) -> Dual a -> Dual b -> Dual c # (>) :: Dual a -> Dual b -> Dual b # (<*) :: Dual a -> Dual b -> Dual a #
Applicative Sum	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods pure :: a -> Sum a # (<>) :: Sum (a -> b) -> Sum a -> Sum b # liftA2 :: (a -> b -> c) -> Sum a -> Sum b -> Sum c # (>) :: Sum a -> Sum b -> Sum b # (<*) :: Sum a -> Sum b -> Sum a #
Applicative Product	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods pure :: a -> Product a # (<>) :: Product (a -> b) -> Product a -> Product b # liftA2 :: (a -> b -> c) -> Product a -> Product b -> Product c # (>) :: Product a -> Product b -> Product b # (<*) :: Product a -> Product b -> Product a #
Applicative Down	Since: base-4.11.0.0
Instance details Defined in Data.Ord Methods pure :: a -> Down a # (<>) :: Down (a -> b) -> Down a -> Down b # liftA2 :: (a -> b -> c) -> Down a -> Down b -> Down c # (>) :: Down a -> Down b -> Down b # (<*) :: Down a -> Down b -> Down a #
Applicative ReadP	Since: base-4.6.0.0
Instance details Defined in Text.ParserCombinators.ReadP Methods pure :: a -> ReadP a # (<>) :: ReadP (a -> b) -> ReadP a -> ReadP b # liftA2 :: (a -> b -> c) -> ReadP a -> ReadP b -> ReadP c # (>) :: ReadP a -> ReadP b -> ReadP b # (<*) :: ReadP a -> ReadP b -> ReadP a #
Applicative NonEmpty	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods pure :: a -> NonEmpty a # (<>) :: NonEmpty (a -> b) -> NonEmpty a -> NonEmpty b # liftA2 :: (a -> b -> c) -> NonEmpty a -> NonEmpty b -> NonEmpty c # (>) :: NonEmpty a -> NonEmpty b -> NonEmpty b # (<*) :: NonEmpty a -> NonEmpty b -> NonEmpty a #
Applicative Put
Instance details Defined in Data.ByteString.Builder.Internal Methods pure :: a -> Put a # (<>) :: Put (a -> b) -> Put a -> Put b # liftA2 :: (a -> b -> c) -> Put a -> Put b -> Put c # (>) :: Put a -> Put b -> Put b # (<*) :: Put a -> Put b -> Put a #
Applicative Tree
Instance details Defined in Data.Tree Methods pure :: a -> Tree a # (<>) :: Tree (a -> b) -> Tree a -> Tree b # liftA2 :: (a -> b -> c) -> Tree a -> Tree b -> Tree c # (>) :: Tree a -> Tree b -> Tree b # (<*) :: Tree a -> Tree b -> Tree a #
Applicative Seq	Since: containers-0.5.4
Instance details Defined in Data.Sequence.Internal Methods pure :: a -> Seq a # (<>) :: Seq (a -> b) -> Seq a -> Seq b # liftA2 :: (a -> b -> c) -> Seq a -> Seq b -> Seq c # (>) :: Seq a -> Seq b -> Seq b # (<*) :: Seq a -> Seq b -> Seq a #
Applicative CryptoFailable
Instance details Defined in Crypto.Error.Types Methods pure :: a -> CryptoFailable a # (<>) :: CryptoFailable (a -> b) -> CryptoFailable a -> CryptoFailable b # liftA2 :: (a -> b -> c) -> CryptoFailable a -> CryptoFailable b -> CryptoFailable c # (>) :: CryptoFailable a -> CryptoFailable b -> CryptoFailable b # (<*) :: CryptoFailable a -> CryptoFailable b -> CryptoFailable a #
Applicative DList
Instance details Defined in Data.DList Methods pure :: a -> DList a # (<>) :: DList (a -> b) -> DList a -> DList b # liftA2 :: (a -> b -> c) -> DList a -> DList b -> DList c # (>) :: DList a -> DList b -> DList b # (<*) :: DList a -> DList b -> DList a #
Applicative P
Instance details Defined in Language.Haskell.Exts.ParseMonad Methods pure :: a -> P a # (<>) :: P (a -> b) -> P a -> P b # liftA2 :: (a -> b -> c) -> P a -> P b -> P c # (>) :: P a -> P b -> P b # (<*) :: P a -> P b -> P a #
Applicative ParseResult
Instance details Defined in Language.Haskell.Exts.ParseMonad Methods pure :: a -> ParseResult a # (<>) :: ParseResult (a -> b) -> ParseResult a -> ParseResult b # liftA2 :: (a -> b -> c) -> ParseResult a -> ParseResult b -> ParseResult c # (>) :: ParseResult a -> ParseResult b -> ParseResult b # (<*) :: ParseResult a -> ParseResult b -> ParseResult a #
Applicative Vector
Instance details Defined in Data.Vector Methods pure :: a -> Vector a # (<>) :: Vector (a -> b) -> Vector a -> Vector b # liftA2 :: (a -> b -> c) -> Vector a -> Vector b -> Vector c # (>) :: Vector a -> Vector b -> Vector b # (<*) :: Vector a -> Vector b -> Vector a #
Applicative SmallArray
Instance details Defined in Data.Primitive.SmallArray Methods pure :: a -> SmallArray a # (<>) :: SmallArray (a -> b) -> SmallArray a -> SmallArray b # liftA2 :: (a -> b -> c) -> SmallArray a -> SmallArray b -> SmallArray c # (>) :: SmallArray a -> SmallArray b -> SmallArray b # (<*) :: SmallArray a -> SmallArray b -> SmallArray a #
Applicative Array
Instance details Defined in Data.Primitive.Array Methods pure :: a -> Array a # (<>) :: Array (a -> b) -> Array a -> Array b # liftA2 :: (a -> b -> c) -> Array a -> Array b -> Array c # (>) :: Array a -> Array b -> Array b # (<*) :: Array a -> Array b -> Array a #
Applicative Stream
Instance details Defined in Codec.Compression.Zlib.Stream Methods pure :: a -> Stream a # (<>) :: Stream (a -> b) -> Stream a -> Stream b # liftA2 :: (a -> b -> c) -> Stream a -> Stream b -> Stream c # (>) :: Stream a -> Stream b -> Stream b # (<*) :: Stream a -> Stream b -> Stream a #
Applicative P	Since: base-4.5.0.0
Instance details Defined in Text.ParserCombinators.ReadP Methods pure :: a -> P a # (<>) :: P (a -> b) -> P a -> P b # liftA2 :: (a -> b -> c) -> P a -> P b -> P c # (>) :: P a -> P b -> P b # (<*) :: P a -> P b -> P a #
Applicative EP
Instance details Defined in Language.Haskell.Exts.ExactPrint Methods pure :: a -> EP a # (<>) :: EP (a -> b) -> EP a -> EP b # liftA2 :: (a -> b -> c) -> EP a -> EP b -> EP c # (>) :: EP a -> EP b -> EP b # (<*) :: EP a -> EP b -> EP a #
Applicative (Either e)	Since: base-3.0
Instance details Defined in Data.Either Methods pure :: a -> Either e a # (<>) :: Either e (a -> b) -> Either e a -> Either e b # liftA2 :: (a -> b -> c) -> Either e a -> Either e b -> Either e c # (>) :: Either e a -> Either e b -> Either e b # (<*) :: Either e a -> Either e b -> Either e a #
Applicative (U1 :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods pure :: a -> U1 a # (<>) :: U1 (a -> b) -> U1 a -> U1 b # liftA2 :: (a -> b -> c) -> U1 a -> U1 b -> U1 c # (>) :: U1 a -> U1 b -> U1 b # (<*) :: U1 a -> U1 b -> U1 a #
Monoid a => Applicative ((,) a)	For tuples, the `Monoid` constraint on `a` determines how the first values merge. For example, `String`s concatenate: ("hello ", (+15)) <> ("world!", 2002) ("hello world!",2017) Since: base-2.1*
Instance details Defined in GHC.Base Methods pure :: a0 -> (a, a0) # (<>) :: (a, a0 -> b) -> (a, a0) -> (a, b) # liftA2 :: (a0 -> b -> c) -> (a, a0) -> (a, b) -> (a, c) # (>) :: (a, a0) -> (a, b) -> (a, b) # (<*) :: (a, a0) -> (a, b) -> (a, a0) #
Monad m => Applicative (WrappedMonad m)	Since: base-2.1
Instance details Defined in Control.Applicative Methods pure :: a -> WrappedMonad m a # (<>) :: WrappedMonad m (a -> b) -> WrappedMonad m a -> WrappedMonad m b # liftA2 :: (a -> b -> c) -> WrappedMonad m a -> WrappedMonad m b -> WrappedMonad m c # (>) :: WrappedMonad m a -> WrappedMonad m b -> WrappedMonad m b # (<*) :: WrappedMonad m a -> WrappedMonad m b -> WrappedMonad m a #
Applicative (Parser i)
Instance details Defined in Data.Attoparsec.Internal.Types Methods pure :: a -> Parser i a # (<>) :: Parser i (a -> b) -> Parser i a -> Parser i b # liftA2 :: (a -> b -> c) -> Parser i a -> Parser i b -> Parser i c # (>) :: Parser i a -> Parser i b -> Parser i b # (<*) :: Parser i a -> Parser i b -> Parser i a #
Applicative (Proxy :: Type -> Type)	Since: base-4.7.0.0
Instance details Defined in Data.Proxy Methods pure :: a -> Proxy a # (<>) :: Proxy (a -> b) -> Proxy a -> Proxy b # liftA2 :: (a -> b -> c) -> Proxy a -> Proxy b -> Proxy c # (>) :: Proxy a -> Proxy b -> Proxy b # (<*) :: Proxy a -> Proxy b -> Proxy a #
Monad m => Applicative (ZipSource m)
Instance details Defined in Data.Conduit.Internal.Conduit Methods pure :: a -> ZipSource m a # (<>) :: ZipSource m (a -> b) -> ZipSource m a -> ZipSource m b # liftA2 :: (a -> b -> c) -> ZipSource m a -> ZipSource m b -> ZipSource m c # (>) :: ZipSource m a -> ZipSource m b -> ZipSource m b # (<*) :: ZipSource m a -> ZipSource m b -> ZipSource m a #
Applicative m => Applicative (ResourceT m)
Instance details Defined in Control.Monad.Trans.Resource.Internal Methods pure :: a -> ResourceT m a # (<>) :: ResourceT m (a -> b) -> ResourceT m a -> ResourceT m b # liftA2 :: (a -> b -> c) -> ResourceT m a -> ResourceT m b -> ResourceT m c # (>) :: ResourceT m a -> ResourceT m b -> ResourceT m b # (<*) :: ResourceT m a -> ResourceT m b -> ResourceT m a #
Applicative (Lex r)
Instance details Defined in Language.Haskell.Exts.ParseMonad Methods pure :: a -> Lex r a # (<>) :: Lex r (a -> b) -> Lex r a -> Lex r b # liftA2 :: (a -> b -> c) -> Lex r a -> Lex r b -> Lex r c # (>) :: Lex r a -> Lex r b -> Lex r b # (<*) :: Lex r a -> Lex r b -> Lex r a #
Applicative (DocM s)
Instance details Defined in Language.Haskell.Exts.Pretty Methods pure :: a -> DocM s a # (<>) :: DocM s (a -> b) -> DocM s a -> DocM s b # liftA2 :: (a -> b -> c) -> DocM s a -> DocM s b -> DocM s c # (>) :: DocM s a -> DocM s b -> DocM s b # (<*) :: DocM s a -> DocM s b -> DocM s a #
Applicative (SetM s)
Instance details Defined in Data.Graph Methods pure :: a -> SetM s a # (<>) :: SetM s (a -> b) -> SetM s a -> SetM s b # liftA2 :: (a -> b -> c) -> SetM s a -> SetM s b -> SetM s c # (>) :: SetM s a -> SetM s b -> SetM s b # (<*) :: SetM s a -> SetM s b -> SetM s a #
Applicative f => Applicative (Rec1 f)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods pure :: a -> Rec1 f a # (<>) :: Rec1 f (a -> b) -> Rec1 f a -> Rec1 f b # liftA2 :: (a -> b -> c) -> Rec1 f a -> Rec1 f b -> Rec1 f c # (>) :: Rec1 f a -> Rec1 f b -> Rec1 f b # (<*) :: Rec1 f a -> Rec1 f b -> Rec1 f a #
Monoid m => Applicative (Const m :: Type -> Type)	Since: base-2.0.1
Instance details Defined in Data.Functor.Const Methods pure :: a -> Const m a # (<>) :: Const m (a -> b) -> Const m a -> Const m b # liftA2 :: (a -> b -> c) -> Const m a -> Const m b -> Const m c # (>) :: Const m a -> Const m b -> Const m b # (<*) :: Const m a -> Const m b -> Const m a #
Arrow a => Applicative (WrappedArrow a b)	Since: base-2.1
Instance details Defined in Control.Applicative Methods pure :: a0 -> WrappedArrow a b a0 # (<>) :: WrappedArrow a b (a0 -> b0) -> WrappedArrow a b a0 -> WrappedArrow a b b0 # liftA2 :: (a0 -> b0 -> c) -> WrappedArrow a b a0 -> WrappedArrow a b b0 -> WrappedArrow a b c # (>) :: WrappedArrow a b a0 -> WrappedArrow a b b0 -> WrappedArrow a b b0 # (<*) :: WrappedArrow a b a0 -> WrappedArrow a b b0 -> WrappedArrow a b a0 #
Applicative f => Applicative (Ap f)	Since: base-4.12.0.0
Instance details Defined in Data.Monoid Methods pure :: a -> Ap f a # (<>) :: Ap f (a -> b) -> Ap f a -> Ap f b # liftA2 :: (a -> b -> c) -> Ap f a -> Ap f b -> Ap f c # (>) :: Ap f a -> Ap f b -> Ap f b # (<*) :: Ap f a -> Ap f b -> Ap f a #
Applicative f => Applicative (Alt f)	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods pure :: a -> Alt f a # (<>) :: Alt f (a -> b) -> Alt f a -> Alt f b # liftA2 :: (a -> b -> c) -> Alt f a -> Alt f b -> Alt f c # (>) :: Alt f a -> Alt f b -> Alt f b # (<*) :: Alt f a -> Alt f b -> Alt f a #
(Functor m, Monad m) => Applicative (ExceptT e m)
Instance details Defined in Control.Monad.Trans.Except Methods pure :: a -> ExceptT e m a # (<>) :: ExceptT e m (a -> b) -> ExceptT e m a -> ExceptT e m b # liftA2 :: (a -> b -> c) -> ExceptT e m a -> ExceptT e m b -> ExceptT e m c # (>) :: ExceptT e m a -> ExceptT e m b -> ExceptT e m b # (<*) :: ExceptT e m a -> ExceptT e m b -> ExceptT e m a #
Monad m => Applicative (ZipSink i m)
Instance details Defined in Data.Conduit.Internal.Conduit Methods pure :: a -> ZipSink i m a # (<>) :: ZipSink i m (a -> b) -> ZipSink i m a -> ZipSink i m b # liftA2 :: (a -> b -> c) -> ZipSink i m a -> ZipSink i m b -> ZipSink i m c # (>) :: ZipSink i m a -> ZipSink i m b -> ZipSink i m b # (<*) :: ZipSink i m a -> ZipSink i m b -> ZipSink i m a #
(Applicative f, Monad f) => Applicative (WhenMissing f x)	Equivalent to `ReaderT k (ReaderT x (MaybeT f))`. Since: containers-0.5.9
Instance details Defined in Data.IntMap.Internal Methods pure :: a -> WhenMissing f x a # (<>) :: WhenMissing f x (a -> b) -> WhenMissing f x a -> WhenMissing f x b # liftA2 :: (a -> b -> c) -> WhenMissing f x a -> WhenMissing f x b -> WhenMissing f x c # (>) :: WhenMissing f x a -> WhenMissing f x b -> WhenMissing f x b # (<*) :: WhenMissing f x a -> WhenMissing f x b -> WhenMissing f x a #
(Functor m, Monad m) => Applicative (ErrorT e m)
Instance details Defined in Control.Monad.Trans.Error Methods pure :: a -> ErrorT e m a # (<>) :: ErrorT e m (a -> b) -> ErrorT e m a -> ErrorT e m b # liftA2 :: (a -> b -> c) -> ErrorT e m a -> ErrorT e m b -> ErrorT e m c # (>) :: ErrorT e m a -> ErrorT e m b -> ErrorT e m b # (<*) :: ErrorT e m a -> ErrorT e m b -> ErrorT e m a #
Applicative (Tagged s)
Instance details Defined in Data.Tagged Methods pure :: a -> Tagged s a # (<>) :: Tagged s (a -> b) -> Tagged s a -> Tagged s b # liftA2 :: (a -> b -> c) -> Tagged s a -> Tagged s b -> Tagged s c # (>) :: Tagged s a -> Tagged s b -> Tagged s b # (<*) :: Tagged s a -> Tagged s b -> Tagged s a #
Applicative ((->) a :: Type -> Type)	Since: base-2.1
Instance details Defined in GHC.Base Methods pure :: a0 -> a -> a0 # (<>) :: (a -> (a0 -> b)) -> (a -> a0) -> a -> b # liftA2 :: (a0 -> b -> c) -> (a -> a0) -> (a -> b) -> a -> c # (>) :: (a -> a0) -> (a -> b) -> a -> b # (<*) :: (a -> a0) -> (a -> b) -> a -> a0 #
Monoid c => Applicative (K1 i c :: Type -> Type)	Since: base-4.12.0.0
Instance details Defined in GHC.Generics Methods pure :: a -> K1 i c a # (<>) :: K1 i c (a -> b) -> K1 i c a -> K1 i c b # liftA2 :: (a -> b -> c0) -> K1 i c a -> K1 i c b -> K1 i c c0 # (>) :: K1 i c a -> K1 i c b -> K1 i c b # (<*) :: K1 i c a -> K1 i c b -> K1 i c a #
(Applicative f, Applicative g) => Applicative (f :*: g)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods pure :: a -> (f :: g) a # (<>) :: (f :: g) (a -> b) -> (f :: g) a -> (f :: g) b # liftA2 :: (a -> b -> c) -> (f :: g) a -> (f :: g) b -> (f :: g) c # (>) :: (f :: g) a -> (f :: g) b -> (f :: g) b # (<) :: (f :: g) a -> (f :: g) b -> (f :: g) a #
(Applicative f, Applicative g) => Applicative (Product f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Product Methods pure :: a -> Product f g a # (<>) :: Product f g (a -> b) -> Product f g a -> Product f g b # liftA2 :: (a -> b -> c) -> Product f g a -> Product f g b -> Product f g c # (>) :: Product f g a -> Product f g b -> Product f g b # (<*) :: Product f g a -> Product f g b -> Product f g a #
Applicative (ConduitT i o m)
Instance details Defined in Data.Conduit.Internal.Conduit Methods pure :: a -> ConduitT i o m a # (<>) :: ConduitT i o m (a -> b) -> ConduitT i o m a -> ConduitT i o m b # liftA2 :: (a -> b -> c) -> ConduitT i o m a -> ConduitT i o m b -> ConduitT i o m c # (>) :: ConduitT i o m a -> ConduitT i o m b -> ConduitT i o m b # (<*) :: ConduitT i o m a -> ConduitT i o m b -> ConduitT i o m a #
Monad m => Applicative (ZipConduit i o m)
Instance details Defined in Data.Conduit.Internal.Conduit Methods pure :: a -> ZipConduit i o m a # (<>) :: ZipConduit i o m (a -> b) -> ZipConduit i o m a -> ZipConduit i o m b # liftA2 :: (a -> b -> c) -> ZipConduit i o m a -> ZipConduit i o m b -> ZipConduit i o m c # (>) :: ZipConduit i o m a -> ZipConduit i o m b -> ZipConduit i o m b # (<*) :: ZipConduit i o m a -> ZipConduit i o m b -> ZipConduit i o m a #
(Monad f, Applicative f) => Applicative (WhenMatched f x y)	Equivalent to `ReaderT Key (ReaderT x (ReaderT y (MaybeT f)))` Since: containers-0.5.9
Instance details Defined in Data.IntMap.Internal Methods pure :: a -> WhenMatched f x y a # (<>) :: WhenMatched f x y (a -> b) -> WhenMatched f x y a -> WhenMatched f x y b # liftA2 :: (a -> b -> c) -> WhenMatched f x y a -> WhenMatched f x y b -> WhenMatched f x y c # (>) :: WhenMatched f x y a -> WhenMatched f x y b -> WhenMatched f x y b # (<*) :: WhenMatched f x y a -> WhenMatched f x y b -> WhenMatched f x y a #
(Applicative f, Monad f) => Applicative (WhenMissing f k x)	Equivalent to `ReaderT k (ReaderT x (MaybeT f))` . Since: containers-0.5.9
Instance details Defined in Data.Map.Internal Methods pure :: a -> WhenMissing f k x a # (<>) :: WhenMissing f k x (a -> b) -> WhenMissing f k x a -> WhenMissing f k x b # liftA2 :: (a -> b -> c) -> WhenMissing f k x a -> WhenMissing f k x b -> WhenMissing f k x c # (>) :: WhenMissing f k x a -> WhenMissing f k x b -> WhenMissing f k x b # (<*) :: WhenMissing f k x a -> WhenMissing f k x b -> WhenMissing f k x a #
Stream s => Applicative (ParsecT e s m)	`pure` returns a parser that succeeds without consuming input.
Instance details Defined in Text.Megaparsec.Internal Methods pure :: a -> ParsecT e s m a # (<>) :: ParsecT e s m (a -> b) -> ParsecT e s m a -> ParsecT e s m b # liftA2 :: (a -> b -> c) -> ParsecT e s m a -> ParsecT e s m b -> ParsecT e s m c # (>) :: ParsecT e s m a -> ParsecT e s m b -> ParsecT e s m b # (<*) :: ParsecT e s m a -> ParsecT e s m b -> ParsecT e s m a #
Applicative f => Applicative (M1 i c f)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods pure :: a -> M1 i c f a # (<>) :: M1 i c f (a -> b) -> M1 i c f a -> M1 i c f b # liftA2 :: (a -> b -> c0) -> M1 i c f a -> M1 i c f b -> M1 i c f c0 # (>) :: M1 i c f a -> M1 i c f b -> M1 i c f b # (<*) :: M1 i c f a -> M1 i c f b -> M1 i c f a #
(Applicative f, Applicative g) => Applicative (f :.: g)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods pure :: a -> (f :.: g) a # (<>) :: (f :.: g) (a -> b) -> (f :.: g) a -> (f :.: g) b # liftA2 :: (a -> b -> c) -> (f :.: g) a -> (f :.: g) b -> (f :.: g) c # (>) :: (f :.: g) a -> (f :.: g) b -> (f :.: g) b # (<*) :: (f :.: g) a -> (f :.: g) b -> (f :.: g) a #
(Applicative f, Applicative g) => Applicative (Compose f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Compose Methods pure :: a -> Compose f g a # (<>) :: Compose f g (a -> b) -> Compose f g a -> Compose f g b # liftA2 :: (a -> b -> c) -> Compose f g a -> Compose f g b -> Compose f g c # (>) :: Compose f g a -> Compose f g b -> Compose f g b # (<*) :: Compose f g a -> Compose f g b -> Compose f g a #
(Monad f, Applicative f) => Applicative (WhenMatched f k x y)	Equivalent to `ReaderT k (ReaderT x (ReaderT y (MaybeT f)))` Since: containers-0.5.9
Instance details Defined in Data.Map.Internal Methods pure :: a -> WhenMatched f k x y a # (<>) :: WhenMatched f k x y (a -> b) -> WhenMatched f k x y a -> WhenMatched f k x y b # liftA2 :: (a -> b -> c) -> WhenMatched f k x y a -> WhenMatched f k x y b -> WhenMatched f k x y c # (>) :: WhenMatched f k x y a -> WhenMatched f k x y b -> WhenMatched f k x y b # (<*) :: WhenMatched f k x y a -> WhenMatched f k x y b -> WhenMatched f k x y a #
Monad state => Applicative (Builder collection mutCollection step state err)
Instance details Defined in Basement.MutableBuilder Methods pure :: a -> Builder collection mutCollection step state err a # (<>) :: Builder collection mutCollection step state err (a -> b) -> Builder collection mutCollection step state err a -> Builder collection mutCollection step state err b # liftA2 :: (a -> b -> c) -> Builder collection mutCollection step state err a -> Builder collection mutCollection step state err b -> Builder collection mutCollection step state err c # (>) :: Builder collection mutCollection step state err a -> Builder collection mutCollection step state err b -> Builder collection mutCollection step state err b # (<*) :: Builder collection mutCollection step state err a -> Builder collection mutCollection step state err b -> Builder collection mutCollection step state err a #
Monad m => Applicative (Pipe l i o u m)
Instance details Defined in Data.Conduit.Internal.Pipe Methods pure :: a -> Pipe l i o u m a # (<>) :: Pipe l i o u m (a -> b) -> Pipe l i o u m a -> Pipe l i o u m b # liftA2 :: (a -> b -> c) -> Pipe l i o u m a -> Pipe l i o u m b -> Pipe l i o u m c # (>) :: Pipe l i o u m a -> Pipe l i o u m b -> Pipe l i o u m b # (<*) :: Pipe l i o u m a -> Pipe l i o u m b -> Pipe l i o u m a #

class Foldable (t :: Type -> Type) where #

Data structures that can be folded.

For example, given a data type

data Tree a = Empty | Leaf a | Node (Tree a) a (Tree a)

a suitable instance would be

instance Foldable Tree where
   foldMap f Empty = mempty
   foldMap f (Leaf x) = f x
   foldMap f (Node l k r) = foldMap f l `mappend` f k `mappend` foldMap f r

This is suitable even for abstract types, as the monoid is assumed to satisfy the monoid laws. Alternatively, one could define foldr:

instance Foldable Tree where
   foldr f z Empty = z
   foldr f z (Leaf x) = f x z
   foldr f z (Node l k r) = foldr f (f k (foldr f z r)) l

Foldable instances are expected to satisfy the following laws:

foldr f z t = appEndo (foldMap (Endo . f) t ) z

foldl f z t = appEndo (getDual (foldMap (Dual . Endo . flip f) t)) z

fold = foldMap id

length = getSum . foldMap (Sum . const  1)

sum, product, maximum, and minimum should all be essentially equivalent to foldMap forms, such as

sum = getSum . foldMap Sum

but may be less defined.

If the type is also a Functor instance, it should satisfy

foldMap f = fold . fmap f

which implies that

foldMap f . fmap g = foldMap (f . g)

Minimal complete definition

foldMap | foldr

Methods

fold :: Monoid m => t m -> m #

Combine the elements of a structure using a monoid.

foldMap :: Monoid m => (a -> m) -> t a -> m #

Map each element of the structure to a monoid, and combine the results.

foldr :: (a -> b -> b) -> b -> t a -> b #

Right-associative fold of a structure.

In the case of lists, foldr, when applied to a binary operator, a starting value (typically the right-identity of the operator), and a list, reduces the list using the binary operator, from right to left:

foldr f z [x1, x2, ..., xn] == x1 `f` (x2 `f` ... (xn `f` z)...)

Note that, since the head of the resulting expression is produced by an application of the operator to the first element of the list, foldr can produce a terminating expression from an infinite list.

For a general Foldable structure this should be semantically identical to,

foldr f z = foldr f z . toList

foldr' :: (a -> b -> b) -> b -> t a -> b #

Right-associative fold of a structure, but with strict application of the operator.

foldl :: (b -> a -> b) -> b -> t a -> b #

Left-associative fold of a structure.

In the case of lists, foldl, when applied to a binary operator, a starting value (typically the left-identity of the operator), and a list, reduces the list using the binary operator, from left to right:

foldl f z [x1, x2, ..., xn] == (...((z `f` x1) `f` x2) `f`...) `f` xn

Note that to produce the outermost application of the operator the entire input list must be traversed. This means that foldl' will diverge if given an infinite list.

Also note that if you want an efficient left-fold, you probably want to use foldl' instead of foldl. The reason for this is that latter does not force the "inner" results (e.g. z f x1 in the above example) before applying them to the operator (e.g. to (f x2)). This results in a thunk chain O(n) elements long, which then must be evaluated from the outside-in.

For a general Foldable structure this should be semantically identical to,

foldl f z = foldl f z . toList

foldl' :: (b -> a -> b) -> b -> t a -> b #

Left-associative fold of a structure but with strict application of the operator.

This ensures that each step of the fold is forced to weak head normal form before being applied, avoiding the collection of thunks that would otherwise occur. This is often what you want to strictly reduce a finite list to a single, monolithic result (e.g. length).

For a general Foldable structure this should be semantically identical to,

foldl f z = foldl' f z . toList

foldr1 :: (a -> a -> a) -> t a -> a #

A variant of foldr that has no base case, and thus may only be applied to non-empty structures.

foldr1 f = foldr1 f . toList

foldl1 :: (a -> a -> a) -> t a -> a #

A variant of foldl that has no base case, and thus may only be applied to non-empty structures.

foldl1 f = foldl1 f . toList

toList :: t a -> [a] #

List of elements of a structure, from left to right.

null :: t a -> Bool #

Test whether the structure is empty. The default implementation is optimized for structures that are similar to cons-lists, because there is no general way to do better.

length :: t a -> Int #

Returns the size/length of a finite structure as an Int. The default implementation is optimized for structures that are similar to cons-lists, because there is no general way to do better.

elem :: Eq a => a -> t a -> Bool infix 4 #

Does the element occur in the structure?

maximum :: Ord a => t a -> a #

The largest element of a non-empty structure.

minimum :: Ord a => t a -> a #

The least element of a non-empty structure.

sum :: Num a => t a -> a #

The sum function computes the sum of the numbers of a structure.

product :: Num a => t a -> a #

The product function computes the product of the numbers of a structure.

Instances

Foldable []	Since: base-2.1
Instance details Defined in Data.Foldable Methods fold :: Monoid m => [m] -> m # foldMap :: Monoid m => (a -> m) -> [a] -> m # foldr :: (a -> b -> b) -> b -> [a] -> b # foldr' :: (a -> b -> b) -> b -> [a] -> b # foldl :: (b -> a -> b) -> b -> [a] -> b # foldl' :: (b -> a -> b) -> b -> [a] -> b # foldr1 :: (a -> a -> a) -> [a] -> a # foldl1 :: (a -> a -> a) -> [a] -> a # toList :: [a] -> [a] # null :: [a] -> Bool # length :: [a] -> Int # elem :: Eq a => a -> [a] -> Bool # maximum :: Ord a => [a] -> a # minimum :: Ord a => [a] -> a # sum :: Num a => [a] -> a # product :: Num a => [a] -> a #
Foldable Maybe	Since: base-2.1
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Maybe m -> m # foldMap :: Monoid m => (a -> m) -> Maybe a -> m # foldr :: (a -> b -> b) -> b -> Maybe a -> b # foldr' :: (a -> b -> b) -> b -> Maybe a -> b # foldl :: (b -> a -> b) -> b -> Maybe a -> b # foldl' :: (b -> a -> b) -> b -> Maybe a -> b # foldr1 :: (a -> a -> a) -> Maybe a -> a # foldl1 :: (a -> a -> a) -> Maybe a -> a # toList :: Maybe a -> [a] # null :: Maybe a -> Bool # length :: Maybe a -> Int # elem :: Eq a => a -> Maybe a -> Bool # maximum :: Ord a => Maybe a -> a # minimum :: Ord a => Maybe a -> a # sum :: Num a => Maybe a -> a # product :: Num a => Maybe a -> a #
Foldable Par1	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Par1 m -> m # foldMap :: Monoid m => (a -> m) -> Par1 a -> m # foldr :: (a -> b -> b) -> b -> Par1 a -> b # foldr' :: (a -> b -> b) -> b -> Par1 a -> b # foldl :: (b -> a -> b) -> b -> Par1 a -> b # foldl' :: (b -> a -> b) -> b -> Par1 a -> b # foldr1 :: (a -> a -> a) -> Par1 a -> a # foldl1 :: (a -> a -> a) -> Par1 a -> a # toList :: Par1 a -> [a] # null :: Par1 a -> Bool # length :: Par1 a -> Int # elem :: Eq a => a -> Par1 a -> Bool # maximum :: Ord a => Par1 a -> a # minimum :: Ord a => Par1 a -> a # sum :: Num a => Par1 a -> a # product :: Num a => Par1 a -> a #
Foldable Last	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fold :: Monoid m => Last m -> m # foldMap :: Monoid m => (a -> m) -> Last a -> m # foldr :: (a -> b -> b) -> b -> Last a -> b # foldr' :: (a -> b -> b) -> b -> Last a -> b # foldl :: (b -> a -> b) -> b -> Last a -> b # foldl' :: (b -> a -> b) -> b -> Last a -> b # foldr1 :: (a -> a -> a) -> Last a -> a # foldl1 :: (a -> a -> a) -> Last a -> a # toList :: Last a -> [a] # null :: Last a -> Bool # length :: Last a -> Int # elem :: Eq a => a -> Last a -> Bool # maximum :: Ord a => Last a -> a # minimum :: Ord a => Last a -> a # sum :: Num a => Last a -> a # product :: Num a => Last a -> a #
Foldable VersionRangeF
Instance details Defined in Distribution.Types.VersionRange Methods fold :: Monoid m => VersionRangeF m -> m # foldMap :: Monoid m => (a -> m) -> VersionRangeF a -> m # foldr :: (a -> b -> b) -> b -> VersionRangeF a -> b # foldr' :: (a -> b -> b) -> b -> VersionRangeF a -> b # foldl :: (b -> a -> b) -> b -> VersionRangeF a -> b # foldl' :: (b -> a -> b) -> b -> VersionRangeF a -> b # foldr1 :: (a -> a -> a) -> VersionRangeF a -> a # foldl1 :: (a -> a -> a) -> VersionRangeF a -> a # toList :: VersionRangeF a -> [a] # null :: VersionRangeF a -> Bool # length :: VersionRangeF a -> Int # elem :: Eq a => a -> VersionRangeF a -> Bool # maximum :: Ord a => VersionRangeF a -> a # minimum :: Ord a => VersionRangeF a -> a # sum :: Num a => VersionRangeF a -> a # product :: Num a => VersionRangeF a -> a #
Foldable SCC	Since: containers-0.5.9
Instance details Defined in Data.Graph Methods fold :: Monoid m => SCC m -> m # foldMap :: Monoid m => (a -> m) -> SCC a -> m # foldr :: (a -> b -> b) -> b -> SCC a -> b # foldr' :: (a -> b -> b) -> b -> SCC a -> b # foldl :: (b -> a -> b) -> b -> SCC a -> b # foldl' :: (b -> a -> b) -> b -> SCC a -> b # foldr1 :: (a -> a -> a) -> SCC a -> a # foldl1 :: (a -> a -> a) -> SCC a -> a # toList :: SCC a -> [a] # null :: SCC a -> Bool # length :: SCC a -> Int # elem :: Eq a => a -> SCC a -> Bool # maximum :: Ord a => SCC a -> a # minimum :: Ord a => SCC a -> a # sum :: Num a => SCC a -> a # product :: Num a => SCC a -> a #
Foldable Set
Instance details Defined in Data.Set.Internal Methods fold :: Monoid m => Set m -> m # foldMap :: Monoid m => (a -> m) -> Set a -> m # foldr :: (a -> b -> b) -> b -> Set a -> b # foldr' :: (a -> b -> b) -> b -> Set a -> b # foldl :: (b -> a -> b) -> b -> Set a -> b # foldl' :: (b -> a -> b) -> b -> Set a -> b # foldr1 :: (a -> a -> a) -> Set a -> a # foldl1 :: (a -> a -> a) -> Set a -> a # toList :: Set a -> [a] # null :: Set a -> Bool # length :: Set a -> Int # elem :: Eq a => a -> Set a -> Bool # maximum :: Ord a => Set a -> a # minimum :: Ord a => Set a -> a # sum :: Num a => Set a -> a # product :: Num a => Set a -> a #
Foldable Identity	Since: base-4.8.0.0
Instance details Defined in Data.Functor.Identity Methods fold :: Monoid m => Identity m -> m # foldMap :: Monoid m => (a -> m) -> Identity a -> m # foldr :: (a -> b -> b) -> b -> Identity a -> b # foldr' :: (a -> b -> b) -> b -> Identity a -> b # foldl :: (b -> a -> b) -> b -> Identity a -> b # foldl' :: (b -> a -> b) -> b -> Identity a -> b # foldr1 :: (a -> a -> a) -> Identity a -> a # foldl1 :: (a -> a -> a) -> Identity a -> a # toList :: Identity a -> [a] # null :: Identity a -> Bool # length :: Identity a -> Int # elem :: Eq a => a -> Identity a -> Bool # maximum :: Ord a => Identity a -> a # minimum :: Ord a => Identity a -> a # sum :: Num a => Identity a -> a # product :: Num a => Identity a -> a #
Foldable ZipList	Since: base-4.9.0.0
Instance details Defined in Control.Applicative Methods fold :: Monoid m => ZipList m -> m # foldMap :: Monoid m => (a -> m) -> ZipList a -> m # foldr :: (a -> b -> b) -> b -> ZipList a -> b # foldr' :: (a -> b -> b) -> b -> ZipList a -> b # foldl :: (b -> a -> b) -> b -> ZipList a -> b # foldl' :: (b -> a -> b) -> b -> ZipList a -> b # foldr1 :: (a -> a -> a) -> ZipList a -> a # foldl1 :: (a -> a -> a) -> ZipList a -> a # toList :: ZipList a -> [a] # null :: ZipList a -> Bool # length :: ZipList a -> Int # elem :: Eq a => a -> ZipList a -> Bool # maximum :: Ord a => ZipList a -> a # minimum :: Ord a => ZipList a -> a # sum :: Num a => ZipList a -> a # product :: Num a => ZipList a -> a #
Foldable IResult
Instance details Defined in Data.Aeson.Types.Internal Methods fold :: Monoid m => IResult m -> m # foldMap :: Monoid m => (a -> m) -> IResult a -> m # foldr :: (a -> b -> b) -> b -> IResult a -> b # foldr' :: (a -> b -> b) -> b -> IResult a -> b # foldl :: (b -> a -> b) -> b -> IResult a -> b # foldl' :: (b -> a -> b) -> b -> IResult a -> b # foldr1 :: (a -> a -> a) -> IResult a -> a # foldl1 :: (a -> a -> a) -> IResult a -> a # toList :: IResult a -> [a] # null :: IResult a -> Bool # length :: IResult a -> Int # elem :: Eq a => a -> IResult a -> Bool # maximum :: Ord a => IResult a -> a # minimum :: Ord a => IResult a -> a # sum :: Num a => IResult a -> a # product :: Num a => IResult a -> a #
Foldable Result
Instance details Defined in Data.Aeson.Types.Internal Methods fold :: Monoid m => Result m -> m # foldMap :: Monoid m => (a -> m) -> Result a -> m # foldr :: (a -> b -> b) -> b -> Result a -> b # foldr' :: (a -> b -> b) -> b -> Result a -> b # foldl :: (b -> a -> b) -> b -> Result a -> b # foldl' :: (b -> a -> b) -> b -> Result a -> b # foldr1 :: (a -> a -> a) -> Result a -> a # foldl1 :: (a -> a -> a) -> Result a -> a # toList :: Result a -> [a] # null :: Result a -> Bool # length :: Result a -> Int # elem :: Eq a => a -> Result a -> Bool # maximum :: Ord a => Result a -> a # minimum :: Ord a => Result a -> a # sum :: Num a => Result a -> a # product :: Num a => Result a -> a #
Foldable Complex	Since: base-4.9.0.0
Instance details Defined in Data.Complex Methods fold :: Monoid m => Complex m -> m # foldMap :: Monoid m => (a -> m) -> Complex a -> m # foldr :: (a -> b -> b) -> b -> Complex a -> b # foldr' :: (a -> b -> b) -> b -> Complex a -> b # foldl :: (b -> a -> b) -> b -> Complex a -> b # foldl' :: (b -> a -> b) -> b -> Complex a -> b # foldr1 :: (a -> a -> a) -> Complex a -> a # foldl1 :: (a -> a -> a) -> Complex a -> a # toList :: Complex a -> [a] # null :: Complex a -> Bool # length :: Complex a -> Int # elem :: Eq a => a -> Complex a -> Bool # maximum :: Ord a => Complex a -> a # minimum :: Ord a => Complex a -> a # sum :: Num a => Complex a -> a # product :: Num a => Complex a -> a #
Foldable Min	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fold :: Monoid m => Min m -> m # foldMap :: Monoid m => (a -> m) -> Min a -> m # foldr :: (a -> b -> b) -> b -> Min a -> b # foldr' :: (a -> b -> b) -> b -> Min a -> b # foldl :: (b -> a -> b) -> b -> Min a -> b # foldl' :: (b -> a -> b) -> b -> Min a -> b # foldr1 :: (a -> a -> a) -> Min a -> a # foldl1 :: (a -> a -> a) -> Min a -> a # toList :: Min a -> [a] # null :: Min a -> Bool # length :: Min a -> Int # elem :: Eq a => a -> Min a -> Bool # maximum :: Ord a => Min a -> a # minimum :: Ord a => Min a -> a # sum :: Num a => Min a -> a # product :: Num a => Min a -> a #
Foldable Max	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fold :: Monoid m => Max m -> m # foldMap :: Monoid m => (a -> m) -> Max a -> m # foldr :: (a -> b -> b) -> b -> Max a -> b # foldr' :: (a -> b -> b) -> b -> Max a -> b # foldl :: (b -> a -> b) -> b -> Max a -> b # foldl' :: (b -> a -> b) -> b -> Max a -> b # foldr1 :: (a -> a -> a) -> Max a -> a # foldl1 :: (a -> a -> a) -> Max a -> a # toList :: Max a -> [a] # null :: Max a -> Bool # length :: Max a -> Int # elem :: Eq a => a -> Max a -> Bool # maximum :: Ord a => Max a -> a # minimum :: Ord a => Max a -> a # sum :: Num a => Max a -> a # product :: Num a => Max a -> a #
Foldable First	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fold :: Monoid m => First m -> m # foldMap :: Monoid m => (a -> m) -> First a -> m # foldr :: (a -> b -> b) -> b -> First a -> b # foldr' :: (a -> b -> b) -> b -> First a -> b # foldl :: (b -> a -> b) -> b -> First a -> b # foldl' :: (b -> a -> b) -> b -> First a -> b # foldr1 :: (a -> a -> a) -> First a -> a # foldl1 :: (a -> a -> a) -> First a -> a # toList :: First a -> [a] # null :: First a -> Bool # length :: First a -> Int # elem :: Eq a => a -> First a -> Bool # maximum :: Ord a => First a -> a # minimum :: Ord a => First a -> a # sum :: Num a => First a -> a # product :: Num a => First a -> a #
Foldable Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fold :: Monoid m => Option m -> m # foldMap :: Monoid m => (a -> m) -> Option a -> m # foldr :: (a -> b -> b) -> b -> Option a -> b # foldr' :: (a -> b -> b) -> b -> Option a -> b # foldl :: (b -> a -> b) -> b -> Option a -> b # foldl' :: (b -> a -> b) -> b -> Option a -> b # foldr1 :: (a -> a -> a) -> Option a -> a # foldl1 :: (a -> a -> a) -> Option a -> a # toList :: Option a -> [a] # null :: Option a -> Bool # length :: Option a -> Int # elem :: Eq a => a -> Option a -> Bool # maximum :: Ord a => Option a -> a # minimum :: Ord a => Option a -> a # sum :: Num a => Option a -> a # product :: Num a => Option a -> a #
Foldable First	Since: base-4.8.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => First m -> m # foldMap :: Monoid m => (a -> m) -> First a -> m # foldr :: (a -> b -> b) -> b -> First a -> b # foldr' :: (a -> b -> b) -> b -> First a -> b # foldl :: (b -> a -> b) -> b -> First a -> b # foldl' :: (b -> a -> b) -> b -> First a -> b # foldr1 :: (a -> a -> a) -> First a -> a # foldl1 :: (a -> a -> a) -> First a -> a # toList :: First a -> [a] # null :: First a -> Bool # length :: First a -> Int # elem :: Eq a => a -> First a -> Bool # maximum :: Ord a => First a -> a # minimum :: Ord a => First a -> a # sum :: Num a => First a -> a # product :: Num a => First a -> a #
Foldable Last	Since: base-4.8.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Last m -> m # foldMap :: Monoid m => (a -> m) -> Last a -> m # foldr :: (a -> b -> b) -> b -> Last a -> b # foldr' :: (a -> b -> b) -> b -> Last a -> b # foldl :: (b -> a -> b) -> b -> Last a -> b # foldl' :: (b -> a -> b) -> b -> Last a -> b # foldr1 :: (a -> a -> a) -> Last a -> a # foldl1 :: (a -> a -> a) -> Last a -> a # toList :: Last a -> [a] # null :: Last a -> Bool # length :: Last a -> Int # elem :: Eq a => a -> Last a -> Bool # maximum :: Ord a => Last a -> a # minimum :: Ord a => Last a -> a # sum :: Num a => Last a -> a # product :: Num a => Last a -> a #
Foldable Dual	Since: base-4.8.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Dual m -> m # foldMap :: Monoid m => (a -> m) -> Dual a -> m # foldr :: (a -> b -> b) -> b -> Dual a -> b # foldr' :: (a -> b -> b) -> b -> Dual a -> b # foldl :: (b -> a -> b) -> b -> Dual a -> b # foldl' :: (b -> a -> b) -> b -> Dual a -> b # foldr1 :: (a -> a -> a) -> Dual a -> a # foldl1 :: (a -> a -> a) -> Dual a -> a # toList :: Dual a -> [a] # null :: Dual a -> Bool # length :: Dual a -> Int # elem :: Eq a => a -> Dual a -> Bool # maximum :: Ord a => Dual a -> a # minimum :: Ord a => Dual a -> a # sum :: Num a => Dual a -> a # product :: Num a => Dual a -> a #
Foldable Sum	Since: base-4.8.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Sum m -> m # foldMap :: Monoid m => (a -> m) -> Sum a -> m # foldr :: (a -> b -> b) -> b -> Sum a -> b # foldr' :: (a -> b -> b) -> b -> Sum a -> b # foldl :: (b -> a -> b) -> b -> Sum a -> b # foldl' :: (b -> a -> b) -> b -> Sum a -> b # foldr1 :: (a -> a -> a) -> Sum a -> a # foldl1 :: (a -> a -> a) -> Sum a -> a # toList :: Sum a -> [a] # null :: Sum a -> Bool # length :: Sum a -> Int # elem :: Eq a => a -> Sum a -> Bool # maximum :: Ord a => Sum a -> a # minimum :: Ord a => Sum a -> a # sum :: Num a => Sum a -> a # product :: Num a => Sum a -> a #
Foldable Product	Since: base-4.8.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Product m -> m # foldMap :: Monoid m => (a -> m) -> Product a -> m # foldr :: (a -> b -> b) -> b -> Product a -> b # foldr' :: (a -> b -> b) -> b -> Product a -> b # foldl :: (b -> a -> b) -> b -> Product a -> b # foldl' :: (b -> a -> b) -> b -> Product a -> b # foldr1 :: (a -> a -> a) -> Product a -> a # foldl1 :: (a -> a -> a) -> Product a -> a # toList :: Product a -> [a] # null :: Product a -> Bool # length :: Product a -> Int # elem :: Eq a => a -> Product a -> Bool # maximum :: Ord a => Product a -> a # minimum :: Ord a => Product a -> a # sum :: Num a => Product a -> a # product :: Num a => Product a -> a #
Foldable Down	Since: base-4.12.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Down m -> m # foldMap :: Monoid m => (a -> m) -> Down a -> m # foldr :: (a -> b -> b) -> b -> Down a -> b # foldr' :: (a -> b -> b) -> b -> Down a -> b # foldl :: (b -> a -> b) -> b -> Down a -> b # foldl' :: (b -> a -> b) -> b -> Down a -> b # foldr1 :: (a -> a -> a) -> Down a -> a # foldl1 :: (a -> a -> a) -> Down a -> a # toList :: Down a -> [a] # null :: Down a -> Bool # length :: Down a -> Int # elem :: Eq a => a -> Down a -> Bool # maximum :: Ord a => Down a -> a # minimum :: Ord a => Down a -> a # sum :: Num a => Down a -> a # product :: Num a => Down a -> a #
Foldable NonEmpty	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => NonEmpty m -> m # foldMap :: Monoid m => (a -> m) -> NonEmpty a -> m # foldr :: (a -> b -> b) -> b -> NonEmpty a -> b # foldr' :: (a -> b -> b) -> b -> NonEmpty a -> b # foldl :: (b -> a -> b) -> b -> NonEmpty a -> b # foldl' :: (b -> a -> b) -> b -> NonEmpty a -> b # foldr1 :: (a -> a -> a) -> NonEmpty a -> a # foldl1 :: (a -> a -> a) -> NonEmpty a -> a # toList :: NonEmpty a -> [a] # null :: NonEmpty a -> Bool # length :: NonEmpty a -> Int # elem :: Eq a => a -> NonEmpty a -> Bool # maximum :: Ord a => NonEmpty a -> a # minimum :: Ord a => NonEmpty a -> a # sum :: Num a => NonEmpty a -> a # product :: Num a => NonEmpty a -> a #
Foldable IntMap
Instance details Defined in Data.IntMap.Internal Methods fold :: Monoid m => IntMap m -> m # foldMap :: Monoid m => (a -> m) -> IntMap a -> m # foldr :: (a -> b -> b) -> b -> IntMap a -> b # foldr' :: (a -> b -> b) -> b -> IntMap a -> b # foldl :: (b -> a -> b) -> b -> IntMap a -> b # foldl' :: (b -> a -> b) -> b -> IntMap a -> b # foldr1 :: (a -> a -> a) -> IntMap a -> a # foldl1 :: (a -> a -> a) -> IntMap a -> a # toList :: IntMap a -> [a] # null :: IntMap a -> Bool # length :: IntMap a -> Int # elem :: Eq a => a -> IntMap a -> Bool # maximum :: Ord a => IntMap a -> a # minimum :: Ord a => IntMap a -> a # sum :: Num a => IntMap a -> a # product :: Num a => IntMap a -> a #
Foldable Tree
Instance details Defined in Data.Tree Methods fold :: Monoid m => Tree m -> m # foldMap :: Monoid m => (a -> m) -> Tree a -> m # foldr :: (a -> b -> b) -> b -> Tree a -> b # foldr' :: (a -> b -> b) -> b -> Tree a -> b # foldl :: (b -> a -> b) -> b -> Tree a -> b # foldl' :: (b -> a -> b) -> b -> Tree a -> b # foldr1 :: (a -> a -> a) -> Tree a -> a # foldl1 :: (a -> a -> a) -> Tree a -> a # toList :: Tree a -> [a] # null :: Tree a -> Bool # length :: Tree a -> Int # elem :: Eq a => a -> Tree a -> Bool # maximum :: Ord a => Tree a -> a # minimum :: Ord a => Tree a -> a # sum :: Num a => Tree a -> a # product :: Num a => Tree a -> a #
Foldable Seq
Instance details Defined in Data.Sequence.Internal Methods fold :: Monoid m => Seq m -> m # foldMap :: Monoid m => (a -> m) -> Seq a -> m # foldr :: (a -> b -> b) -> b -> Seq a -> b # foldr' :: (a -> b -> b) -> b -> Seq a -> b # foldl :: (b -> a -> b) -> b -> Seq a -> b # foldl' :: (b -> a -> b) -> b -> Seq a -> b # foldr1 :: (a -> a -> a) -> Seq a -> a # foldl1 :: (a -> a -> a) -> Seq a -> a # toList :: Seq a -> [a] # null :: Seq a -> Bool # length :: Seq a -> Int # elem :: Eq a => a -> Seq a -> Bool # maximum :: Ord a => Seq a -> a # minimum :: Ord a => Seq a -> a # sum :: Num a => Seq a -> a # product :: Num a => Seq a -> a #
Foldable FingerTree
Instance details Defined in Data.Sequence.Internal Methods fold :: Monoid m => FingerTree m -> m # foldMap :: Monoid m => (a -> m) -> FingerTree a -> m # foldr :: (a -> b -> b) -> b -> FingerTree a -> b # foldr' :: (a -> b -> b) -> b -> FingerTree a -> b # foldl :: (b -> a -> b) -> b -> FingerTree a -> b # foldl' :: (b -> a -> b) -> b -> FingerTree a -> b # foldr1 :: (a -> a -> a) -> FingerTree a -> a # foldl1 :: (a -> a -> a) -> FingerTree a -> a # toList :: FingerTree a -> [a] # null :: FingerTree a -> Bool # length :: FingerTree a -> Int # elem :: Eq a => a -> FingerTree a -> Bool # maximum :: Ord a => FingerTree a -> a # minimum :: Ord a => FingerTree a -> a # sum :: Num a => FingerTree a -> a # product :: Num a => FingerTree a -> a #
Foldable Digit
Instance details Defined in Data.Sequence.Internal Methods fold :: Monoid m => Digit m -> m # foldMap :: Monoid m => (a -> m) -> Digit a -> m # foldr :: (a -> b -> b) -> b -> Digit a -> b # foldr' :: (a -> b -> b) -> b -> Digit a -> b # foldl :: (b -> a -> b) -> b -> Digit a -> b # foldl' :: (b -> a -> b) -> b -> Digit a -> b # foldr1 :: (a -> a -> a) -> Digit a -> a # foldl1 :: (a -> a -> a) -> Digit a -> a # toList :: Digit a -> [a] # null :: Digit a -> Bool # length :: Digit a -> Int # elem :: Eq a => a -> Digit a -> Bool # maximum :: Ord a => Digit a -> a # minimum :: Ord a => Digit a -> a # sum :: Num a => Digit a -> a # product :: Num a => Digit a -> a #
Foldable Node
Instance details Defined in Data.Sequence.Internal Methods fold :: Monoid m => Node m -> m # foldMap :: Monoid m => (a -> m) -> Node a -> m # foldr :: (a -> b -> b) -> b -> Node a -> b # foldr' :: (a -> b -> b) -> b -> Node a -> b # foldl :: (b -> a -> b) -> b -> Node a -> b # foldl' :: (b -> a -> b) -> b -> Node a -> b # foldr1 :: (a -> a -> a) -> Node a -> a # foldl1 :: (a -> a -> a) -> Node a -> a # toList :: Node a -> [a] # null :: Node a -> Bool # length :: Node a -> Int # elem :: Eq a => a -> Node a -> Bool # maximum :: Ord a => Node a -> a # minimum :: Ord a => Node a -> a # sum :: Num a => Node a -> a # product :: Num a => Node a -> a #
Foldable Elem
Instance details Defined in Data.Sequence.Internal Methods fold :: Monoid m => Elem m -> m # foldMap :: Monoid m => (a -> m) -> Elem a -> m # foldr :: (a -> b -> b) -> b -> Elem a -> b # foldr' :: (a -> b -> b) -> b -> Elem a -> b # foldl :: (b -> a -> b) -> b -> Elem a -> b # foldl' :: (b -> a -> b) -> b -> Elem a -> b # foldr1 :: (a -> a -> a) -> Elem a -> a # foldl1 :: (a -> a -> a) -> Elem a -> a # toList :: Elem a -> [a] # null :: Elem a -> Bool # length :: Elem a -> Int # elem :: Eq a => a -> Elem a -> Bool # maximum :: Ord a => Elem a -> a # minimum :: Ord a => Elem a -> a # sum :: Num a => Elem a -> a # product :: Num a => Elem a -> a #
Foldable ViewL
Instance details Defined in Data.Sequence.Internal Methods fold :: Monoid m => ViewL m -> m # foldMap :: Monoid m => (a -> m) -> ViewL a -> m # foldr :: (a -> b -> b) -> b -> ViewL a -> b # foldr' :: (a -> b -> b) -> b -> ViewL a -> b # foldl :: (b -> a -> b) -> b -> ViewL a -> b # foldl' :: (b -> a -> b) -> b -> ViewL a -> b # foldr1 :: (a -> a -> a) -> ViewL a -> a # foldl1 :: (a -> a -> a) -> ViewL a -> a # toList :: ViewL a -> [a] # null :: ViewL a -> Bool # length :: ViewL a -> Int # elem :: Eq a => a -> ViewL a -> Bool # maximum :: Ord a => ViewL a -> a # minimum :: Ord a => ViewL a -> a # sum :: Num a => ViewL a -> a # product :: Num a => ViewL a -> a #
Foldable ViewR
Instance details Defined in Data.Sequence.Internal Methods fold :: Monoid m => ViewR m -> m # foldMap :: Monoid m => (a -> m) -> ViewR a -> m # foldr :: (a -> b -> b) -> b -> ViewR a -> b # foldr' :: (a -> b -> b) -> b -> ViewR a -> b # foldl :: (b -> a -> b) -> b -> ViewR a -> b # foldl' :: (b -> a -> b) -> b -> ViewR a -> b # foldr1 :: (a -> a -> a) -> ViewR a -> a # foldl1 :: (a -> a -> a) -> ViewR a -> a # toList :: ViewR a -> [a] # null :: ViewR a -> Bool # length :: ViewR a -> Int # elem :: Eq a => a -> ViewR a -> Bool # maximum :: Ord a => ViewR a -> a # minimum :: Ord a => ViewR a -> a # sum :: Num a => ViewR a -> a # product :: Num a => ViewR a -> a #
Foldable DList
Instance details Defined in Data.DList Methods fold :: Monoid m => DList m -> m # foldMap :: Monoid m => (a -> m) -> DList a -> m # foldr :: (a -> b -> b) -> b -> DList a -> b # foldr' :: (a -> b -> b) -> b -> DList a -> b # foldl :: (b -> a -> b) -> b -> DList a -> b # foldl' :: (b -> a -> b) -> b -> DList a -> b # foldr1 :: (a -> a -> a) -> DList a -> a # foldl1 :: (a -> a -> a) -> DList a -> a # toList :: DList a -> [a] # null :: DList a -> Bool # length :: DList a -> Int # elem :: Eq a => a -> DList a -> Bool # maximum :: Ord a => DList a -> a # minimum :: Ord a => DList a -> a # sum :: Num a => DList a -> a # product :: Num a => DList a -> a #
Foldable Hashed
Instance details Defined in Data.Hashable.Class Methods fold :: Monoid m => Hashed m -> m # foldMap :: Monoid m => (a -> m) -> Hashed a -> m # foldr :: (a -> b -> b) -> b -> Hashed a -> b # foldr' :: (a -> b -> b) -> b -> Hashed a -> b # foldl :: (b -> a -> b) -> b -> Hashed a -> b # foldl' :: (b -> a -> b) -> b -> Hashed a -> b # foldr1 :: (a -> a -> a) -> Hashed a -> a # foldl1 :: (a -> a -> a) -> Hashed a -> a # toList :: Hashed a -> [a] # null :: Hashed a -> Bool # length :: Hashed a -> Int # elem :: Eq a => a -> Hashed a -> Bool # maximum :: Ord a => Hashed a -> a # minimum :: Ord a => Hashed a -> a # sum :: Num a => Hashed a -> a # product :: Num a => Hashed a -> a #
Foldable Name
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Name m -> m # foldMap :: Monoid m => (a -> m) -> Name a -> m # foldr :: (a -> b -> b) -> b -> Name a -> b # foldr' :: (a -> b -> b) -> b -> Name a -> b # foldl :: (b -> a -> b) -> b -> Name a -> b # foldl' :: (b -> a -> b) -> b -> Name a -> b # foldr1 :: (a -> a -> a) -> Name a -> a # foldl1 :: (a -> a -> a) -> Name a -> a # toList :: Name a -> [a] # null :: Name a -> Bool # length :: Name a -> Int # elem :: Eq a => a -> Name a -> Bool # maximum :: Ord a => Name a -> a # minimum :: Ord a => Name a -> a # sum :: Num a => Name a -> a # product :: Num a => Name a -> a #
Foldable Scoped
Instance details Defined in Language.Haskell.Names.Types Methods fold :: Monoid m => Scoped m -> m # foldMap :: Monoid m => (a -> m) -> Scoped a -> m # foldr :: (a -> b -> b) -> b -> Scoped a -> b # foldr' :: (a -> b -> b) -> b -> Scoped a -> b # foldl :: (b -> a -> b) -> b -> Scoped a -> b # foldl' :: (b -> a -> b) -> b -> Scoped a -> b # foldr1 :: (a -> a -> a) -> Scoped a -> a # foldl1 :: (a -> a -> a) -> Scoped a -> a # toList :: Scoped a -> [a] # null :: Scoped a -> Bool # length :: Scoped a -> Int # elem :: Eq a => a -> Scoped a -> Bool # maximum :: Ord a => Scoped a -> a # minimum :: Ord a => Scoped a -> a # sum :: Num a => Scoped a -> a # product :: Num a => Scoped a -> a #
Foldable NameInfo
Instance details Defined in Language.Haskell.Names.Types Methods fold :: Monoid m => NameInfo m -> m # foldMap :: Monoid m => (a -> m) -> NameInfo a -> m # foldr :: (a -> b -> b) -> b -> NameInfo a -> b # foldr' :: (a -> b -> b) -> b -> NameInfo a -> b # foldl :: (b -> a -> b) -> b -> NameInfo a -> b # foldl' :: (b -> a -> b) -> b -> NameInfo a -> b # foldr1 :: (a -> a -> a) -> NameInfo a -> a # foldl1 :: (a -> a -> a) -> NameInfo a -> a # toList :: NameInfo a -> [a] # null :: NameInfo a -> Bool # length :: NameInfo a -> Int # elem :: Eq a => a -> NameInfo a -> Bool # maximum :: Ord a => NameInfo a -> a # minimum :: Ord a => NameInfo a -> a # sum :: Num a => NameInfo a -> a # product :: Num a => NameInfo a -> a #
Foldable Error
Instance details Defined in Language.Haskell.Names.Types Methods fold :: Monoid m => Error m -> m # foldMap :: Monoid m => (a -> m) -> Error a -> m # foldr :: (a -> b -> b) -> b -> Error a -> b # foldr' :: (a -> b -> b) -> b -> Error a -> b # foldl :: (b -> a -> b) -> b -> Error a -> b # foldl' :: (b -> a -> b) -> b -> Error a -> b # foldr1 :: (a -> a -> a) -> Error a -> a # foldl1 :: (a -> a -> a) -> Error a -> a # toList :: Error a -> [a] # null :: Error a -> Bool # length :: Error a -> Int # elem :: Eq a => a -> Error a -> Bool # maximum :: Ord a => Error a -> a # minimum :: Ord a => Error a -> a # sum :: Num a => Error a -> a # product :: Num a => Error a -> a #
Foldable ModuleName
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => ModuleName m -> m # foldMap :: Monoid m => (a -> m) -> ModuleName a -> m # foldr :: (a -> b -> b) -> b -> ModuleName a -> b # foldr' :: (a -> b -> b) -> b -> ModuleName a -> b # foldl :: (b -> a -> b) -> b -> ModuleName a -> b # foldl' :: (b -> a -> b) -> b -> ModuleName a -> b # foldr1 :: (a -> a -> a) -> ModuleName a -> a # foldl1 :: (a -> a -> a) -> ModuleName a -> a # toList :: ModuleName a -> [a] # null :: ModuleName a -> Bool # length :: ModuleName a -> Int # elem :: Eq a => a -> ModuleName a -> Bool # maximum :: Ord a => ModuleName a -> a # minimum :: Ord a => ModuleName a -> a # sum :: Num a => ModuleName a -> a # product :: Num a => ModuleName a -> a #
Foldable SpecialCon
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => SpecialCon m -> m # foldMap :: Monoid m => (a -> m) -> SpecialCon a -> m # foldr :: (a -> b -> b) -> b -> SpecialCon a -> b # foldr' :: (a -> b -> b) -> b -> SpecialCon a -> b # foldl :: (b -> a -> b) -> b -> SpecialCon a -> b # foldl' :: (b -> a -> b) -> b -> SpecialCon a -> b # foldr1 :: (a -> a -> a) -> SpecialCon a -> a # foldl1 :: (a -> a -> a) -> SpecialCon a -> a # toList :: SpecialCon a -> [a] # null :: SpecialCon a -> Bool # length :: SpecialCon a -> Int # elem :: Eq a => a -> SpecialCon a -> Bool # maximum :: Ord a => SpecialCon a -> a # minimum :: Ord a => SpecialCon a -> a # sum :: Num a => SpecialCon a -> a # product :: Num a => SpecialCon a -> a #
Foldable QName
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => QName m -> m # foldMap :: Monoid m => (a -> m) -> QName a -> m # foldr :: (a -> b -> b) -> b -> QName a -> b # foldr' :: (a -> b -> b) -> b -> QName a -> b # foldl :: (b -> a -> b) -> b -> QName a -> b # foldl' :: (b -> a -> b) -> b -> QName a -> b # foldr1 :: (a -> a -> a) -> QName a -> a # foldl1 :: (a -> a -> a) -> QName a -> a # toList :: QName a -> [a] # null :: QName a -> Bool # length :: QName a -> Int # elem :: Eq a => a -> QName a -> Bool # maximum :: Ord a => QName a -> a # minimum :: Ord a => QName a -> a # sum :: Num a => QName a -> a # product :: Num a => QName a -> a #
Foldable IPName
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => IPName m -> m # foldMap :: Monoid m => (a -> m) -> IPName a -> m # foldr :: (a -> b -> b) -> b -> IPName a -> b # foldr' :: (a -> b -> b) -> b -> IPName a -> b # foldl :: (b -> a -> b) -> b -> IPName a -> b # foldl' :: (b -> a -> b) -> b -> IPName a -> b # foldr1 :: (a -> a -> a) -> IPName a -> a # foldl1 :: (a -> a -> a) -> IPName a -> a # toList :: IPName a -> [a] # null :: IPName a -> Bool # length :: IPName a -> Int # elem :: Eq a => a -> IPName a -> Bool # maximum :: Ord a => IPName a -> a # minimum :: Ord a => IPName a -> a # sum :: Num a => IPName a -> a # product :: Num a => IPName a -> a #
Foldable QOp
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => QOp m -> m # foldMap :: Monoid m => (a -> m) -> QOp a -> m # foldr :: (a -> b -> b) -> b -> QOp a -> b # foldr' :: (a -> b -> b) -> b -> QOp a -> b # foldl :: (b -> a -> b) -> b -> QOp a -> b # foldl' :: (b -> a -> b) -> b -> QOp a -> b # foldr1 :: (a -> a -> a) -> QOp a -> a # foldl1 :: (a -> a -> a) -> QOp a -> a # toList :: QOp a -> [a] # null :: QOp a -> Bool # length :: QOp a -> Int # elem :: Eq a => a -> QOp a -> Bool # maximum :: Ord a => QOp a -> a # minimum :: Ord a => QOp a -> a # sum :: Num a => QOp a -> a # product :: Num a => QOp a -> a #
Foldable Op
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Op m -> m # foldMap :: Monoid m => (a -> m) -> Op a -> m # foldr :: (a -> b -> b) -> b -> Op a -> b # foldr' :: (a -> b -> b) -> b -> Op a -> b # foldl :: (b -> a -> b) -> b -> Op a -> b # foldl' :: (b -> a -> b) -> b -> Op a -> b # foldr1 :: (a -> a -> a) -> Op a -> a # foldl1 :: (a -> a -> a) -> Op a -> a # toList :: Op a -> [a] # null :: Op a -> Bool # length :: Op a -> Int # elem :: Eq a => a -> Op a -> Bool # maximum :: Ord a => Op a -> a # minimum :: Ord a => Op a -> a # sum :: Num a => Op a -> a # product :: Num a => Op a -> a #
Foldable CName
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => CName m -> m # foldMap :: Monoid m => (a -> m) -> CName a -> m # foldr :: (a -> b -> b) -> b -> CName a -> b # foldr' :: (a -> b -> b) -> b -> CName a -> b # foldl :: (b -> a -> b) -> b -> CName a -> b # foldl' :: (b -> a -> b) -> b -> CName a -> b # foldr1 :: (a -> a -> a) -> CName a -> a # foldl1 :: (a -> a -> a) -> CName a -> a # toList :: CName a -> [a] # null :: CName a -> Bool # length :: CName a -> Int # elem :: Eq a => a -> CName a -> Bool # maximum :: Ord a => CName a -> a # minimum :: Ord a => CName a -> a # sum :: Num a => CName a -> a # product :: Num a => CName a -> a #
Foldable Module
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Module m -> m # foldMap :: Monoid m => (a -> m) -> Module a -> m # foldr :: (a -> b -> b) -> b -> Module a -> b # foldr' :: (a -> b -> b) -> b -> Module a -> b # foldl :: (b -> a -> b) -> b -> Module a -> b # foldl' :: (b -> a -> b) -> b -> Module a -> b # foldr1 :: (a -> a -> a) -> Module a -> a # foldl1 :: (a -> a -> a) -> Module a -> a # toList :: Module a -> [a] # null :: Module a -> Bool # length :: Module a -> Int # elem :: Eq a => a -> Module a -> Bool # maximum :: Ord a => Module a -> a # minimum :: Ord a => Module a -> a # sum :: Num a => Module a -> a # product :: Num a => Module a -> a #
Foldable ModuleHead
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => ModuleHead m -> m # foldMap :: Monoid m => (a -> m) -> ModuleHead a -> m # foldr :: (a -> b -> b) -> b -> ModuleHead a -> b # foldr' :: (a -> b -> b) -> b -> ModuleHead a -> b # foldl :: (b -> a -> b) -> b -> ModuleHead a -> b # foldl' :: (b -> a -> b) -> b -> ModuleHead a -> b # foldr1 :: (a -> a -> a) -> ModuleHead a -> a # foldl1 :: (a -> a -> a) -> ModuleHead a -> a # toList :: ModuleHead a -> [a] # null :: ModuleHead a -> Bool # length :: ModuleHead a -> Int # elem :: Eq a => a -> ModuleHead a -> Bool # maximum :: Ord a => ModuleHead a -> a # minimum :: Ord a => ModuleHead a -> a # sum :: Num a => ModuleHead a -> a # product :: Num a => ModuleHead a -> a #
Foldable ExportSpecList
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => ExportSpecList m -> m # foldMap :: Monoid m => (a -> m) -> ExportSpecList a -> m # foldr :: (a -> b -> b) -> b -> ExportSpecList a -> b # foldr' :: (a -> b -> b) -> b -> ExportSpecList a -> b # foldl :: (b -> a -> b) -> b -> ExportSpecList a -> b # foldl' :: (b -> a -> b) -> b -> ExportSpecList a -> b # foldr1 :: (a -> a -> a) -> ExportSpecList a -> a # foldl1 :: (a -> a -> a) -> ExportSpecList a -> a # toList :: ExportSpecList a -> [a] # null :: ExportSpecList a -> Bool # length :: ExportSpecList a -> Int # elem :: Eq a => a -> ExportSpecList a -> Bool # maximum :: Ord a => ExportSpecList a -> a # minimum :: Ord a => ExportSpecList a -> a # sum :: Num a => ExportSpecList a -> a # product :: Num a => ExportSpecList a -> a #
Foldable ExportSpec
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => ExportSpec m -> m # foldMap :: Monoid m => (a -> m) -> ExportSpec a -> m # foldr :: (a -> b -> b) -> b -> ExportSpec a -> b # foldr' :: (a -> b -> b) -> b -> ExportSpec a -> b # foldl :: (b -> a -> b) -> b -> ExportSpec a -> b # foldl' :: (b -> a -> b) -> b -> ExportSpec a -> b # foldr1 :: (a -> a -> a) -> ExportSpec a -> a # foldl1 :: (a -> a -> a) -> ExportSpec a -> a # toList :: ExportSpec a -> [a] # null :: ExportSpec a -> Bool # length :: ExportSpec a -> Int # elem :: Eq a => a -> ExportSpec a -> Bool # maximum :: Ord a => ExportSpec a -> a # minimum :: Ord a => ExportSpec a -> a # sum :: Num a => ExportSpec a -> a # product :: Num a => ExportSpec a -> a #
Foldable EWildcard
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => EWildcard m -> m # foldMap :: Monoid m => (a -> m) -> EWildcard a -> m # foldr :: (a -> b -> b) -> b -> EWildcard a -> b # foldr' :: (a -> b -> b) -> b -> EWildcard a -> b # foldl :: (b -> a -> b) -> b -> EWildcard a -> b # foldl' :: (b -> a -> b) -> b -> EWildcard a -> b # foldr1 :: (a -> a -> a) -> EWildcard a -> a # foldl1 :: (a -> a -> a) -> EWildcard a -> a # toList :: EWildcard a -> [a] # null :: EWildcard a -> Bool # length :: EWildcard a -> Int # elem :: Eq a => a -> EWildcard a -> Bool # maximum :: Ord a => EWildcard a -> a # minimum :: Ord a => EWildcard a -> a # sum :: Num a => EWildcard a -> a # product :: Num a => EWildcard a -> a #
Foldable Namespace
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Namespace m -> m # foldMap :: Monoid m => (a -> m) -> Namespace a -> m # foldr :: (a -> b -> b) -> b -> Namespace a -> b # foldr' :: (a -> b -> b) -> b -> Namespace a -> b # foldl :: (b -> a -> b) -> b -> Namespace a -> b # foldl' :: (b -> a -> b) -> b -> Namespace a -> b # foldr1 :: (a -> a -> a) -> Namespace a -> a # foldl1 :: (a -> a -> a) -> Namespace a -> a # toList :: Namespace a -> [a] # null :: Namespace a -> Bool # length :: Namespace a -> Int # elem :: Eq a => a -> Namespace a -> Bool # maximum :: Ord a => Namespace a -> a # minimum :: Ord a => Namespace a -> a # sum :: Num a => Namespace a -> a # product :: Num a => Namespace a -> a #
Foldable ImportDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => ImportDecl m -> m # foldMap :: Monoid m => (a -> m) -> ImportDecl a -> m # foldr :: (a -> b -> b) -> b -> ImportDecl a -> b # foldr' :: (a -> b -> b) -> b -> ImportDecl a -> b # foldl :: (b -> a -> b) -> b -> ImportDecl a -> b # foldl' :: (b -> a -> b) -> b -> ImportDecl a -> b # foldr1 :: (a -> a -> a) -> ImportDecl a -> a # foldl1 :: (a -> a -> a) -> ImportDecl a -> a # toList :: ImportDecl a -> [a] # null :: ImportDecl a -> Bool # length :: ImportDecl a -> Int # elem :: Eq a => a -> ImportDecl a -> Bool # maximum :: Ord a => ImportDecl a -> a # minimum :: Ord a => ImportDecl a -> a # sum :: Num a => ImportDecl a -> a # product :: Num a => ImportDecl a -> a #
Foldable ImportSpecList
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => ImportSpecList m -> m # foldMap :: Monoid m => (a -> m) -> ImportSpecList a -> m # foldr :: (a -> b -> b) -> b -> ImportSpecList a -> b # foldr' :: (a -> b -> b) -> b -> ImportSpecList a -> b # foldl :: (b -> a -> b) -> b -> ImportSpecList a -> b # foldl' :: (b -> a -> b) -> b -> ImportSpecList a -> b # foldr1 :: (a -> a -> a) -> ImportSpecList a -> a # foldl1 :: (a -> a -> a) -> ImportSpecList a -> a # toList :: ImportSpecList a -> [a] # null :: ImportSpecList a -> Bool # length :: ImportSpecList a -> Int # elem :: Eq a => a -> ImportSpecList a -> Bool # maximum :: Ord a => ImportSpecList a -> a # minimum :: Ord a => ImportSpecList a -> a # sum :: Num a => ImportSpecList a -> a # product :: Num a => ImportSpecList a -> a #
Foldable ImportSpec
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => ImportSpec m -> m # foldMap :: Monoid m => (a -> m) -> ImportSpec a -> m # foldr :: (a -> b -> b) -> b -> ImportSpec a -> b # foldr' :: (a -> b -> b) -> b -> ImportSpec a -> b # foldl :: (b -> a -> b) -> b -> ImportSpec a -> b # foldl' :: (b -> a -> b) -> b -> ImportSpec a -> b # foldr1 :: (a -> a -> a) -> ImportSpec a -> a # foldl1 :: (a -> a -> a) -> ImportSpec a -> a # toList :: ImportSpec a -> [a] # null :: ImportSpec a -> Bool # length :: ImportSpec a -> Int # elem :: Eq a => a -> ImportSpec a -> Bool # maximum :: Ord a => ImportSpec a -> a # minimum :: Ord a => ImportSpec a -> a # sum :: Num a => ImportSpec a -> a # product :: Num a => ImportSpec a -> a #
Foldable Assoc
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Assoc m -> m # foldMap :: Monoid m => (a -> m) -> Assoc a -> m # foldr :: (a -> b -> b) -> b -> Assoc a -> b # foldr' :: (a -> b -> b) -> b -> Assoc a -> b # foldl :: (b -> a -> b) -> b -> Assoc a -> b # foldl' :: (b -> a -> b) -> b -> Assoc a -> b # foldr1 :: (a -> a -> a) -> Assoc a -> a # foldl1 :: (a -> a -> a) -> Assoc a -> a # toList :: Assoc a -> [a] # null :: Assoc a -> Bool # length :: Assoc a -> Int # elem :: Eq a => a -> Assoc a -> Bool # maximum :: Ord a => Assoc a -> a # minimum :: Ord a => Assoc a -> a # sum :: Num a => Assoc a -> a # product :: Num a => Assoc a -> a #
Foldable Decl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Decl m -> m # foldMap :: Monoid m => (a -> m) -> Decl a -> m # foldr :: (a -> b -> b) -> b -> Decl a -> b # foldr' :: (a -> b -> b) -> b -> Decl a -> b # foldl :: (b -> a -> b) -> b -> Decl a -> b # foldl' :: (b -> a -> b) -> b -> Decl a -> b # foldr1 :: (a -> a -> a) -> Decl a -> a # foldl1 :: (a -> a -> a) -> Decl a -> a # toList :: Decl a -> [a] # null :: Decl a -> Bool # length :: Decl a -> Int # elem :: Eq a => a -> Decl a -> Bool # maximum :: Ord a => Decl a -> a # minimum :: Ord a => Decl a -> a # sum :: Num a => Decl a -> a # product :: Num a => Decl a -> a #
Foldable PatternSynDirection
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => PatternSynDirection m -> m # foldMap :: Monoid m => (a -> m) -> PatternSynDirection a -> m # foldr :: (a -> b -> b) -> b -> PatternSynDirection a -> b # foldr' :: (a -> b -> b) -> b -> PatternSynDirection a -> b # foldl :: (b -> a -> b) -> b -> PatternSynDirection a -> b # foldl' :: (b -> a -> b) -> b -> PatternSynDirection a -> b # foldr1 :: (a -> a -> a) -> PatternSynDirection a -> a # foldl1 :: (a -> a -> a) -> PatternSynDirection a -> a # toList :: PatternSynDirection a -> [a] # null :: PatternSynDirection a -> Bool # length :: PatternSynDirection a -> Int # elem :: Eq a => a -> PatternSynDirection a -> Bool # maximum :: Ord a => PatternSynDirection a -> a # minimum :: Ord a => PatternSynDirection a -> a # sum :: Num a => PatternSynDirection a -> a # product :: Num a => PatternSynDirection a -> a #
Foldable TypeEqn
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => TypeEqn m -> m # foldMap :: Monoid m => (a -> m) -> TypeEqn a -> m # foldr :: (a -> b -> b) -> b -> TypeEqn a -> b # foldr' :: (a -> b -> b) -> b -> TypeEqn a -> b # foldl :: (b -> a -> b) -> b -> TypeEqn a -> b # foldl' :: (b -> a -> b) -> b -> TypeEqn a -> b # foldr1 :: (a -> a -> a) -> TypeEqn a -> a # foldl1 :: (a -> a -> a) -> TypeEqn a -> a # toList :: TypeEqn a -> [a] # null :: TypeEqn a -> Bool # length :: TypeEqn a -> Int # elem :: Eq a => a -> TypeEqn a -> Bool # maximum :: Ord a => TypeEqn a -> a # minimum :: Ord a => TypeEqn a -> a # sum :: Num a => TypeEqn a -> a # product :: Num a => TypeEqn a -> a #
Foldable Annotation
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Annotation m -> m # foldMap :: Monoid m => (a -> m) -> Annotation a -> m # foldr :: (a -> b -> b) -> b -> Annotation a -> b # foldr' :: (a -> b -> b) -> b -> Annotation a -> b # foldl :: (b -> a -> b) -> b -> Annotation a -> b # foldl' :: (b -> a -> b) -> b -> Annotation a -> b # foldr1 :: (a -> a -> a) -> Annotation a -> a # foldl1 :: (a -> a -> a) -> Annotation a -> a # toList :: Annotation a -> [a] # null :: Annotation a -> Bool # length :: Annotation a -> Int # elem :: Eq a => a -> Annotation a -> Bool # maximum :: Ord a => Annotation a -> a # minimum :: Ord a => Annotation a -> a # sum :: Num a => Annotation a -> a # product :: Num a => Annotation a -> a #
Foldable BooleanFormula
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => BooleanFormula m -> m # foldMap :: Monoid m => (a -> m) -> BooleanFormula a -> m # foldr :: (a -> b -> b) -> b -> BooleanFormula a -> b # foldr' :: (a -> b -> b) -> b -> BooleanFormula a -> b # foldl :: (b -> a -> b) -> b -> BooleanFormula a -> b # foldl' :: (b -> a -> b) -> b -> BooleanFormula a -> b # foldr1 :: (a -> a -> a) -> BooleanFormula a -> a # foldl1 :: (a -> a -> a) -> BooleanFormula a -> a # toList :: BooleanFormula a -> [a] # null :: BooleanFormula a -> Bool # length :: BooleanFormula a -> Int # elem :: Eq a => a -> BooleanFormula a -> Bool # maximum :: Ord a => BooleanFormula a -> a # minimum :: Ord a => BooleanFormula a -> a # sum :: Num a => BooleanFormula a -> a # product :: Num a => BooleanFormula a -> a #
Foldable Role
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Role m -> m # foldMap :: Monoid m => (a -> m) -> Role a -> m # foldr :: (a -> b -> b) -> b -> Role a -> b # foldr' :: (a -> b -> b) -> b -> Role a -> b # foldl :: (b -> a -> b) -> b -> Role a -> b # foldl' :: (b -> a -> b) -> b -> Role a -> b # foldr1 :: (a -> a -> a) -> Role a -> a # foldl1 :: (a -> a -> a) -> Role a -> a # toList :: Role a -> [a] # null :: Role a -> Bool # length :: Role a -> Int # elem :: Eq a => a -> Role a -> Bool # maximum :: Ord a => Role a -> a # minimum :: Ord a => Role a -> a # sum :: Num a => Role a -> a # product :: Num a => Role a -> a #
Foldable DataOrNew
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => DataOrNew m -> m # foldMap :: Monoid m => (a -> m) -> DataOrNew a -> m # foldr :: (a -> b -> b) -> b -> DataOrNew a -> b # foldr' :: (a -> b -> b) -> b -> DataOrNew a -> b # foldl :: (b -> a -> b) -> b -> DataOrNew a -> b # foldl' :: (b -> a -> b) -> b -> DataOrNew a -> b # foldr1 :: (a -> a -> a) -> DataOrNew a -> a # foldl1 :: (a -> a -> a) -> DataOrNew a -> a # toList :: DataOrNew a -> [a] # null :: DataOrNew a -> Bool # length :: DataOrNew a -> Int # elem :: Eq a => a -> DataOrNew a -> Bool # maximum :: Ord a => DataOrNew a -> a # minimum :: Ord a => DataOrNew a -> a # sum :: Num a => DataOrNew a -> a # product :: Num a => DataOrNew a -> a #
Foldable InjectivityInfo
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => InjectivityInfo m -> m # foldMap :: Monoid m => (a -> m) -> InjectivityInfo a -> m # foldr :: (a -> b -> b) -> b -> InjectivityInfo a -> b # foldr' :: (a -> b -> b) -> b -> InjectivityInfo a -> b # foldl :: (b -> a -> b) -> b -> InjectivityInfo a -> b # foldl' :: (b -> a -> b) -> b -> InjectivityInfo a -> b # foldr1 :: (a -> a -> a) -> InjectivityInfo a -> a # foldl1 :: (a -> a -> a) -> InjectivityInfo a -> a # toList :: InjectivityInfo a -> [a] # null :: InjectivityInfo a -> Bool # length :: InjectivityInfo a -> Int # elem :: Eq a => a -> InjectivityInfo a -> Bool # maximum :: Ord a => InjectivityInfo a -> a # minimum :: Ord a => InjectivityInfo a -> a # sum :: Num a => InjectivityInfo a -> a # product :: Num a => InjectivityInfo a -> a #
Foldable ResultSig
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => ResultSig m -> m # foldMap :: Monoid m => (a -> m) -> ResultSig a -> m # foldr :: (a -> b -> b) -> b -> ResultSig a -> b # foldr' :: (a -> b -> b) -> b -> ResultSig a -> b # foldl :: (b -> a -> b) -> b -> ResultSig a -> b # foldl' :: (b -> a -> b) -> b -> ResultSig a -> b # foldr1 :: (a -> a -> a) -> ResultSig a -> a # foldl1 :: (a -> a -> a) -> ResultSig a -> a # toList :: ResultSig a -> [a] # null :: ResultSig a -> Bool # length :: ResultSig a -> Int # elem :: Eq a => a -> ResultSig a -> Bool # maximum :: Ord a => ResultSig a -> a # minimum :: Ord a => ResultSig a -> a # sum :: Num a => ResultSig a -> a # product :: Num a => ResultSig a -> a #
Foldable DeclHead
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => DeclHead m -> m # foldMap :: Monoid m => (a -> m) -> DeclHead a -> m # foldr :: (a -> b -> b) -> b -> DeclHead a -> b # foldr' :: (a -> b -> b) -> b -> DeclHead a -> b # foldl :: (b -> a -> b) -> b -> DeclHead a -> b # foldl' :: (b -> a -> b) -> b -> DeclHead a -> b # foldr1 :: (a -> a -> a) -> DeclHead a -> a # foldl1 :: (a -> a -> a) -> DeclHead a -> a # toList :: DeclHead a -> [a] # null :: DeclHead a -> Bool # length :: DeclHead a -> Int # elem :: Eq a => a -> DeclHead a -> Bool # maximum :: Ord a => DeclHead a -> a # minimum :: Ord a => DeclHead a -> a # sum :: Num a => DeclHead a -> a # product :: Num a => DeclHead a -> a #
Foldable InstRule
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => InstRule m -> m # foldMap :: Monoid m => (a -> m) -> InstRule a -> m # foldr :: (a -> b -> b) -> b -> InstRule a -> b # foldr' :: (a -> b -> b) -> b -> InstRule a -> b # foldl :: (b -> a -> b) -> b -> InstRule a -> b # foldl' :: (b -> a -> b) -> b -> InstRule a -> b # foldr1 :: (a -> a -> a) -> InstRule a -> a # foldl1 :: (a -> a -> a) -> InstRule a -> a # toList :: InstRule a -> [a] # null :: InstRule a -> Bool # length :: InstRule a -> Int # elem :: Eq a => a -> InstRule a -> Bool # maximum :: Ord a => InstRule a -> a # minimum :: Ord a => InstRule a -> a # sum :: Num a => InstRule a -> a # product :: Num a => InstRule a -> a #
Foldable InstHead
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => InstHead m -> m # foldMap :: Monoid m => (a -> m) -> InstHead a -> m # foldr :: (a -> b -> b) -> b -> InstHead a -> b # foldr' :: (a -> b -> b) -> b -> InstHead a -> b # foldl :: (b -> a -> b) -> b -> InstHead a -> b # foldl' :: (b -> a -> b) -> b -> InstHead a -> b # foldr1 :: (a -> a -> a) -> InstHead a -> a # foldl1 :: (a -> a -> a) -> InstHead a -> a # toList :: InstHead a -> [a] # null :: InstHead a -> Bool # length :: InstHead a -> Int # elem :: Eq a => a -> InstHead a -> Bool # maximum :: Ord a => InstHead a -> a # minimum :: Ord a => InstHead a -> a # sum :: Num a => InstHead a -> a # product :: Num a => InstHead a -> a #
Foldable Deriving
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Deriving m -> m # foldMap :: Monoid m => (a -> m) -> Deriving a -> m # foldr :: (a -> b -> b) -> b -> Deriving a -> b # foldr' :: (a -> b -> b) -> b -> Deriving a -> b # foldl :: (b -> a -> b) -> b -> Deriving a -> b # foldl' :: (b -> a -> b) -> b -> Deriving a -> b # foldr1 :: (a -> a -> a) -> Deriving a -> a # foldl1 :: (a -> a -> a) -> Deriving a -> a # toList :: Deriving a -> [a] # null :: Deriving a -> Bool # length :: Deriving a -> Int # elem :: Eq a => a -> Deriving a -> Bool # maximum :: Ord a => Deriving a -> a # minimum :: Ord a => Deriving a -> a # sum :: Num a => Deriving a -> a # product :: Num a => Deriving a -> a #
Foldable DerivStrategy
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => DerivStrategy m -> m # foldMap :: Monoid m => (a -> m) -> DerivStrategy a -> m # foldr :: (a -> b -> b) -> b -> DerivStrategy a -> b # foldr' :: (a -> b -> b) -> b -> DerivStrategy a -> b # foldl :: (b -> a -> b) -> b -> DerivStrategy a -> b # foldl' :: (b -> a -> b) -> b -> DerivStrategy a -> b # foldr1 :: (a -> a -> a) -> DerivStrategy a -> a # foldl1 :: (a -> a -> a) -> DerivStrategy a -> a # toList :: DerivStrategy a -> [a] # null :: DerivStrategy a -> Bool # length :: DerivStrategy a -> Int # elem :: Eq a => a -> DerivStrategy a -> Bool # maximum :: Ord a => DerivStrategy a -> a # minimum :: Ord a => DerivStrategy a -> a # sum :: Num a => DerivStrategy a -> a # product :: Num a => DerivStrategy a -> a #
Foldable Binds
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Binds m -> m # foldMap :: Monoid m => (a -> m) -> Binds a -> m # foldr :: (a -> b -> b) -> b -> Binds a -> b # foldr' :: (a -> b -> b) -> b -> Binds a -> b # foldl :: (b -> a -> b) -> b -> Binds a -> b # foldl' :: (b -> a -> b) -> b -> Binds a -> b # foldr1 :: (a -> a -> a) -> Binds a -> a # foldl1 :: (a -> a -> a) -> Binds a -> a # toList :: Binds a -> [a] # null :: Binds a -> Bool # length :: Binds a -> Int # elem :: Eq a => a -> Binds a -> Bool # maximum :: Ord a => Binds a -> a # minimum :: Ord a => Binds a -> a # sum :: Num a => Binds a -> a # product :: Num a => Binds a -> a #
Foldable IPBind
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => IPBind m -> m # foldMap :: Monoid m => (a -> m) -> IPBind a -> m # foldr :: (a -> b -> b) -> b -> IPBind a -> b # foldr' :: (a -> b -> b) -> b -> IPBind a -> b # foldl :: (b -> a -> b) -> b -> IPBind a -> b # foldl' :: (b -> a -> b) -> b -> IPBind a -> b # foldr1 :: (a -> a -> a) -> IPBind a -> a # foldl1 :: (a -> a -> a) -> IPBind a -> a # toList :: IPBind a -> [a] # null :: IPBind a -> Bool # length :: IPBind a -> Int # elem :: Eq a => a -> IPBind a -> Bool # maximum :: Ord a => IPBind a -> a # minimum :: Ord a => IPBind a -> a # sum :: Num a => IPBind a -> a # product :: Num a => IPBind a -> a #
Foldable Match
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Match m -> m # foldMap :: Monoid m => (a -> m) -> Match a -> m # foldr :: (a -> b -> b) -> b -> Match a -> b # foldr' :: (a -> b -> b) -> b -> Match a -> b # foldl :: (b -> a -> b) -> b -> Match a -> b # foldl' :: (b -> a -> b) -> b -> Match a -> b # foldr1 :: (a -> a -> a) -> Match a -> a # foldl1 :: (a -> a -> a) -> Match a -> a # toList :: Match a -> [a] # null :: Match a -> Bool # length :: Match a -> Int # elem :: Eq a => a -> Match a -> Bool # maximum :: Ord a => Match a -> a # minimum :: Ord a => Match a -> a # sum :: Num a => Match a -> a # product :: Num a => Match a -> a #
Foldable QualConDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => QualConDecl m -> m # foldMap :: Monoid m => (a -> m) -> QualConDecl a -> m # foldr :: (a -> b -> b) -> b -> QualConDecl a -> b # foldr' :: (a -> b -> b) -> b -> QualConDecl a -> b # foldl :: (b -> a -> b) -> b -> QualConDecl a -> b # foldl' :: (b -> a -> b) -> b -> QualConDecl a -> b # foldr1 :: (a -> a -> a) -> QualConDecl a -> a # foldl1 :: (a -> a -> a) -> QualConDecl a -> a # toList :: QualConDecl a -> [a] # null :: QualConDecl a -> Bool # length :: QualConDecl a -> Int # elem :: Eq a => a -> QualConDecl a -> Bool # maximum :: Ord a => QualConDecl a -> a # minimum :: Ord a => QualConDecl a -> a # sum :: Num a => QualConDecl a -> a # product :: Num a => QualConDecl a -> a #
Foldable ConDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => ConDecl m -> m # foldMap :: Monoid m => (a -> m) -> ConDecl a -> m # foldr :: (a -> b -> b) -> b -> ConDecl a -> b # foldr' :: (a -> b -> b) -> b -> ConDecl a -> b # foldl :: (b -> a -> b) -> b -> ConDecl a -> b # foldl' :: (b -> a -> b) -> b -> ConDecl a -> b # foldr1 :: (a -> a -> a) -> ConDecl a -> a # foldl1 :: (a -> a -> a) -> ConDecl a -> a # toList :: ConDecl a -> [a] # null :: ConDecl a -> Bool # length :: ConDecl a -> Int # elem :: Eq a => a -> ConDecl a -> Bool # maximum :: Ord a => ConDecl a -> a # minimum :: Ord a => ConDecl a -> a # sum :: Num a => ConDecl a -> a # product :: Num a => ConDecl a -> a #
Foldable FieldDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => FieldDecl m -> m # foldMap :: Monoid m => (a -> m) -> FieldDecl a -> m # foldr :: (a -> b -> b) -> b -> FieldDecl a -> b # foldr' :: (a -> b -> b) -> b -> FieldDecl a -> b # foldl :: (b -> a -> b) -> b -> FieldDecl a -> b # foldl' :: (b -> a -> b) -> b -> FieldDecl a -> b # foldr1 :: (a -> a -> a) -> FieldDecl a -> a # foldl1 :: (a -> a -> a) -> FieldDecl a -> a # toList :: FieldDecl a -> [a] # null :: FieldDecl a -> Bool # length :: FieldDecl a -> Int # elem :: Eq a => a -> FieldDecl a -> Bool # maximum :: Ord a => FieldDecl a -> a # minimum :: Ord a => FieldDecl a -> a # sum :: Num a => FieldDecl a -> a # product :: Num a => FieldDecl a -> a #
Foldable GadtDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => GadtDecl m -> m # foldMap :: Monoid m => (a -> m) -> GadtDecl a -> m # foldr :: (a -> b -> b) -> b -> GadtDecl a -> b # foldr' :: (a -> b -> b) -> b -> GadtDecl a -> b # foldl :: (b -> a -> b) -> b -> GadtDecl a -> b # foldl' :: (b -> a -> b) -> b -> GadtDecl a -> b # foldr1 :: (a -> a -> a) -> GadtDecl a -> a # foldl1 :: (a -> a -> a) -> GadtDecl a -> a # toList :: GadtDecl a -> [a] # null :: GadtDecl a -> Bool # length :: GadtDecl a -> Int # elem :: Eq a => a -> GadtDecl a -> Bool # maximum :: Ord a => GadtDecl a -> a # minimum :: Ord a => GadtDecl a -> a # sum :: Num a => GadtDecl a -> a # product :: Num a => GadtDecl a -> a #
Foldable ClassDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => ClassDecl m -> m # foldMap :: Monoid m => (a -> m) -> ClassDecl a -> m # foldr :: (a -> b -> b) -> b -> ClassDecl a -> b # foldr' :: (a -> b -> b) -> b -> ClassDecl a -> b # foldl :: (b -> a -> b) -> b -> ClassDecl a -> b # foldl' :: (b -> a -> b) -> b -> ClassDecl a -> b # foldr1 :: (a -> a -> a) -> ClassDecl a -> a # foldl1 :: (a -> a -> a) -> ClassDecl a -> a # toList :: ClassDecl a -> [a] # null :: ClassDecl a -> Bool # length :: ClassDecl a -> Int # elem :: Eq a => a -> ClassDecl a -> Bool # maximum :: Ord a => ClassDecl a -> a # minimum :: Ord a => ClassDecl a -> a # sum :: Num a => ClassDecl a -> a # product :: Num a => ClassDecl a -> a #
Foldable InstDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => InstDecl m -> m # foldMap :: Monoid m => (a -> m) -> InstDecl a -> m # foldr :: (a -> b -> b) -> b -> InstDecl a -> b # foldr' :: (a -> b -> b) -> b -> InstDecl a -> b # foldl :: (b -> a -> b) -> b -> InstDecl a -> b # foldl' :: (b -> a -> b) -> b -> InstDecl a -> b # foldr1 :: (a -> a -> a) -> InstDecl a -> a # foldl1 :: (a -> a -> a) -> InstDecl a -> a # toList :: InstDecl a -> [a] # null :: InstDecl a -> Bool # length :: InstDecl a -> Int # elem :: Eq a => a -> InstDecl a -> Bool # maximum :: Ord a => InstDecl a -> a # minimum :: Ord a => InstDecl a -> a # sum :: Num a => InstDecl a -> a # product :: Num a => InstDecl a -> a #
Foldable BangType
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => BangType m -> m # foldMap :: Monoid m => (a -> m) -> BangType a -> m # foldr :: (a -> b -> b) -> b -> BangType a -> b # foldr' :: (a -> b -> b) -> b -> BangType a -> b # foldl :: (b -> a -> b) -> b -> BangType a -> b # foldl' :: (b -> a -> b) -> b -> BangType a -> b # foldr1 :: (a -> a -> a) -> BangType a -> a # foldl1 :: (a -> a -> a) -> BangType a -> a # toList :: BangType a -> [a] # null :: BangType a -> Bool # length :: BangType a -> Int # elem :: Eq a => a -> BangType a -> Bool # maximum :: Ord a => BangType a -> a # minimum :: Ord a => BangType a -> a # sum :: Num a => BangType a -> a # product :: Num a => BangType a -> a #
Foldable Unpackedness
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Unpackedness m -> m # foldMap :: Monoid m => (a -> m) -> Unpackedness a -> m # foldr :: (a -> b -> b) -> b -> Unpackedness a -> b # foldr' :: (a -> b -> b) -> b -> Unpackedness a -> b # foldl :: (b -> a -> b) -> b -> Unpackedness a -> b # foldl' :: (b -> a -> b) -> b -> Unpackedness a -> b # foldr1 :: (a -> a -> a) -> Unpackedness a -> a # foldl1 :: (a -> a -> a) -> Unpackedness a -> a # toList :: Unpackedness a -> [a] # null :: Unpackedness a -> Bool # length :: Unpackedness a -> Int # elem :: Eq a => a -> Unpackedness a -> Bool # maximum :: Ord a => Unpackedness a -> a # minimum :: Ord a => Unpackedness a -> a # sum :: Num a => Unpackedness a -> a # product :: Num a => Unpackedness a -> a #
Foldable Rhs
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Rhs m -> m # foldMap :: Monoid m => (a -> m) -> Rhs a -> m # foldr :: (a -> b -> b) -> b -> Rhs a -> b # foldr' :: (a -> b -> b) -> b -> Rhs a -> b # foldl :: (b -> a -> b) -> b -> Rhs a -> b # foldl' :: (b -> a -> b) -> b -> Rhs a -> b # foldr1 :: (a -> a -> a) -> Rhs a -> a # foldl1 :: (a -> a -> a) -> Rhs a -> a # toList :: Rhs a -> [a] # null :: Rhs a -> Bool # length :: Rhs a -> Int # elem :: Eq a => a -> Rhs a -> Bool # maximum :: Ord a => Rhs a -> a # minimum :: Ord a => Rhs a -> a # sum :: Num a => Rhs a -> a # product :: Num a => Rhs a -> a #
Foldable GuardedRhs
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => GuardedRhs m -> m # foldMap :: Monoid m => (a -> m) -> GuardedRhs a -> m # foldr :: (a -> b -> b) -> b -> GuardedRhs a -> b # foldr' :: (a -> b -> b) -> b -> GuardedRhs a -> b # foldl :: (b -> a -> b) -> b -> GuardedRhs a -> b # foldl' :: (b -> a -> b) -> b -> GuardedRhs a -> b # foldr1 :: (a -> a -> a) -> GuardedRhs a -> a # foldl1 :: (a -> a -> a) -> GuardedRhs a -> a # toList :: GuardedRhs a -> [a] # null :: GuardedRhs a -> Bool # length :: GuardedRhs a -> Int # elem :: Eq a => a -> GuardedRhs a -> Bool # maximum :: Ord a => GuardedRhs a -> a # minimum :: Ord a => GuardedRhs a -> a # sum :: Num a => GuardedRhs a -> a # product :: Num a => GuardedRhs a -> a #
Foldable Type
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Type m -> m # foldMap :: Monoid m => (a -> m) -> Type a -> m # foldr :: (a -> b -> b) -> b -> Type a -> b # foldr' :: (a -> b -> b) -> b -> Type a -> b # foldl :: (b -> a -> b) -> b -> Type a -> b # foldl' :: (b -> a -> b) -> b -> Type a -> b # foldr1 :: (a -> a -> a) -> Type a -> a # foldl1 :: (a -> a -> a) -> Type a -> a # toList :: Type a -> [a] # null :: Type a -> Bool # length :: Type a -> Int # elem :: Eq a => a -> Type a -> Bool # maximum :: Ord a => Type a -> a # minimum :: Ord a => Type a -> a # sum :: Num a => Type a -> a # product :: Num a => Type a -> a #
Foldable MaybePromotedName
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => MaybePromotedName m -> m # foldMap :: Monoid m => (a -> m) -> MaybePromotedName a -> m # foldr :: (a -> b -> b) -> b -> MaybePromotedName a -> b # foldr' :: (a -> b -> b) -> b -> MaybePromotedName a -> b # foldl :: (b -> a -> b) -> b -> MaybePromotedName a -> b # foldl' :: (b -> a -> b) -> b -> MaybePromotedName a -> b # foldr1 :: (a -> a -> a) -> MaybePromotedName a -> a # foldl1 :: (a -> a -> a) -> MaybePromotedName a -> a # toList :: MaybePromotedName a -> [a] # null :: MaybePromotedName a -> Bool # length :: MaybePromotedName a -> Int # elem :: Eq a => a -> MaybePromotedName a -> Bool # maximum :: Ord a => MaybePromotedName a -> a # minimum :: Ord a => MaybePromotedName a -> a # sum :: Num a => MaybePromotedName a -> a # product :: Num a => MaybePromotedName a -> a #
Foldable Promoted
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Promoted m -> m # foldMap :: Monoid m => (a -> m) -> Promoted a -> m # foldr :: (a -> b -> b) -> b -> Promoted a -> b # foldr' :: (a -> b -> b) -> b -> Promoted a -> b # foldl :: (b -> a -> b) -> b -> Promoted a -> b # foldl' :: (b -> a -> b) -> b -> Promoted a -> b # foldr1 :: (a -> a -> a) -> Promoted a -> a # foldl1 :: (a -> a -> a) -> Promoted a -> a # toList :: Promoted a -> [a] # null :: Promoted a -> Bool # length :: Promoted a -> Int # elem :: Eq a => a -> Promoted a -> Bool # maximum :: Ord a => Promoted a -> a # minimum :: Ord a => Promoted a -> a # sum :: Num a => Promoted a -> a # product :: Num a => Promoted a -> a #
Foldable TyVarBind
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => TyVarBind m -> m # foldMap :: Monoid m => (a -> m) -> TyVarBind a -> m # foldr :: (a -> b -> b) -> b -> TyVarBind a -> b # foldr' :: (a -> b -> b) -> b -> TyVarBind a -> b # foldl :: (b -> a -> b) -> b -> TyVarBind a -> b # foldl' :: (b -> a -> b) -> b -> TyVarBind a -> b # foldr1 :: (a -> a -> a) -> TyVarBind a -> a # foldl1 :: (a -> a -> a) -> TyVarBind a -> a # toList :: TyVarBind a -> [a] # null :: TyVarBind a -> Bool # length :: TyVarBind a -> Int # elem :: Eq a => a -> TyVarBind a -> Bool # maximum :: Ord a => TyVarBind a -> a # minimum :: Ord a => TyVarBind a -> a # sum :: Num a => TyVarBind a -> a # product :: Num a => TyVarBind a -> a #
Foldable Kind
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Kind m -> m # foldMap :: Monoid m => (a -> m) -> Kind a -> m # foldr :: (a -> b -> b) -> b -> Kind a -> b # foldr' :: (a -> b -> b) -> b -> Kind a -> b # foldl :: (b -> a -> b) -> b -> Kind a -> b # foldl' :: (b -> a -> b) -> b -> Kind a -> b # foldr1 :: (a -> a -> a) -> Kind a -> a # foldl1 :: (a -> a -> a) -> Kind a -> a # toList :: Kind a -> [a] # null :: Kind a -> Bool # length :: Kind a -> Int # elem :: Eq a => a -> Kind a -> Bool # maximum :: Ord a => Kind a -> a # minimum :: Ord a => Kind a -> a # sum :: Num a => Kind a -> a # product :: Num a => Kind a -> a #
Foldable FunDep
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => FunDep m -> m # foldMap :: Monoid m => (a -> m) -> FunDep a -> m # foldr :: (a -> b -> b) -> b -> FunDep a -> b # foldr' :: (a -> b -> b) -> b -> FunDep a -> b # foldl :: (b -> a -> b) -> b -> FunDep a -> b # foldl' :: (b -> a -> b) -> b -> FunDep a -> b # foldr1 :: (a -> a -> a) -> FunDep a -> a # foldl1 :: (a -> a -> a) -> FunDep a -> a # toList :: FunDep a -> [a] # null :: FunDep a -> Bool # length :: FunDep a -> Int # elem :: Eq a => a -> FunDep a -> Bool # maximum :: Ord a => FunDep a -> a # minimum :: Ord a => FunDep a -> a # sum :: Num a => FunDep a -> a # product :: Num a => FunDep a -> a #
Foldable Context
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Context m -> m # foldMap :: Monoid m => (a -> m) -> Context a -> m # foldr :: (a -> b -> b) -> b -> Context a -> b # foldr' :: (a -> b -> b) -> b -> Context a -> b # foldl :: (b -> a -> b) -> b -> Context a -> b # foldl' :: (b -> a -> b) -> b -> Context a -> b # foldr1 :: (a -> a -> a) -> Context a -> a # foldl1 :: (a -> a -> a) -> Context a -> a # toList :: Context a -> [a] # null :: Context a -> Bool # length :: Context a -> Int # elem :: Eq a => a -> Context a -> Bool # maximum :: Ord a => Context a -> a # minimum :: Ord a => Context a -> a # sum :: Num a => Context a -> a # product :: Num a => Context a -> a #
Foldable Asst
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Asst m -> m # foldMap :: Monoid m => (a -> m) -> Asst a -> m # foldr :: (a -> b -> b) -> b -> Asst a -> b # foldr' :: (a -> b -> b) -> b -> Asst a -> b # foldl :: (b -> a -> b) -> b -> Asst a -> b # foldl' :: (b -> a -> b) -> b -> Asst a -> b # foldr1 :: (a -> a -> a) -> Asst a -> a # foldl1 :: (a -> a -> a) -> Asst a -> a # toList :: Asst a -> [a] # null :: Asst a -> Bool # length :: Asst a -> Int # elem :: Eq a => a -> Asst a -> Bool # maximum :: Ord a => Asst a -> a # minimum :: Ord a => Asst a -> a # sum :: Num a => Asst a -> a # product :: Num a => Asst a -> a #
Foldable Literal
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Literal m -> m # foldMap :: Monoid m => (a -> m) -> Literal a -> m # foldr :: (a -> b -> b) -> b -> Literal a -> b # foldr' :: (a -> b -> b) -> b -> Literal a -> b # foldl :: (b -> a -> b) -> b -> Literal a -> b # foldl' :: (b -> a -> b) -> b -> Literal a -> b # foldr1 :: (a -> a -> a) -> Literal a -> a # foldl1 :: (a -> a -> a) -> Literal a -> a # toList :: Literal a -> [a] # null :: Literal a -> Bool # length :: Literal a -> Int # elem :: Eq a => a -> Literal a -> Bool # maximum :: Ord a => Literal a -> a # minimum :: Ord a => Literal a -> a # sum :: Num a => Literal a -> a # product :: Num a => Literal a -> a #
Foldable Sign
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Sign m -> m # foldMap :: Monoid m => (a -> m) -> Sign a -> m # foldr :: (a -> b -> b) -> b -> Sign a -> b # foldr' :: (a -> b -> b) -> b -> Sign a -> b # foldl :: (b -> a -> b) -> b -> Sign a -> b # foldl' :: (b -> a -> b) -> b -> Sign a -> b # foldr1 :: (a -> a -> a) -> Sign a -> a # foldl1 :: (a -> a -> a) -> Sign a -> a # toList :: Sign a -> [a] # null :: Sign a -> Bool # length :: Sign a -> Int # elem :: Eq a => a -> Sign a -> Bool # maximum :: Ord a => Sign a -> a # minimum :: Ord a => Sign a -> a # sum :: Num a => Sign a -> a # product :: Num a => Sign a -> a #
Foldable Exp
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Exp m -> m # foldMap :: Monoid m => (a -> m) -> Exp a -> m # foldr :: (a -> b -> b) -> b -> Exp a -> b # foldr' :: (a -> b -> b) -> b -> Exp a -> b # foldl :: (b -> a -> b) -> b -> Exp a -> b # foldl' :: (b -> a -> b) -> b -> Exp a -> b # foldr1 :: (a -> a -> a) -> Exp a -> a # foldl1 :: (a -> a -> a) -> Exp a -> a # toList :: Exp a -> [a] # null :: Exp a -> Bool # length :: Exp a -> Int # elem :: Eq a => a -> Exp a -> Bool # maximum :: Ord a => Exp a -> a # minimum :: Ord a => Exp a -> a # sum :: Num a => Exp a -> a # product :: Num a => Exp a -> a #
Foldable XName
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => XName m -> m # foldMap :: Monoid m => (a -> m) -> XName a -> m # foldr :: (a -> b -> b) -> b -> XName a -> b # foldr' :: (a -> b -> b) -> b -> XName a -> b # foldl :: (b -> a -> b) -> b -> XName a -> b # foldl' :: (b -> a -> b) -> b -> XName a -> b # foldr1 :: (a -> a -> a) -> XName a -> a # foldl1 :: (a -> a -> a) -> XName a -> a # toList :: XName a -> [a] # null :: XName a -> Bool # length :: XName a -> Int # elem :: Eq a => a -> XName a -> Bool # maximum :: Ord a => XName a -> a # minimum :: Ord a => XName a -> a # sum :: Num a => XName a -> a # product :: Num a => XName a -> a #
Foldable XAttr
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => XAttr m -> m # foldMap :: Monoid m => (a -> m) -> XAttr a -> m # foldr :: (a -> b -> b) -> b -> XAttr a -> b # foldr' :: (a -> b -> b) -> b -> XAttr a -> b # foldl :: (b -> a -> b) -> b -> XAttr a -> b # foldl' :: (b -> a -> b) -> b -> XAttr a -> b # foldr1 :: (a -> a -> a) -> XAttr a -> a # foldl1 :: (a -> a -> a) -> XAttr a -> a # toList :: XAttr a -> [a] # null :: XAttr a -> Bool # length :: XAttr a -> Int # elem :: Eq a => a -> XAttr a -> Bool # maximum :: Ord a => XAttr a -> a # minimum :: Ord a => XAttr a -> a # sum :: Num a => XAttr a -> a # product :: Num a => XAttr a -> a #
Foldable Bracket
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Bracket m -> m # foldMap :: Monoid m => (a -> m) -> Bracket a -> m # foldr :: (a -> b -> b) -> b -> Bracket a -> b # foldr' :: (a -> b -> b) -> b -> Bracket a -> b # foldl :: (b -> a -> b) -> b -> Bracket a -> b # foldl' :: (b -> a -> b) -> b -> Bracket a -> b # foldr1 :: (a -> a -> a) -> Bracket a -> a # foldl1 :: (a -> a -> a) -> Bracket a -> a # toList :: Bracket a -> [a] # null :: Bracket a -> Bool # length :: Bracket a -> Int # elem :: Eq a => a -> Bracket a -> Bool # maximum :: Ord a => Bracket a -> a # minimum :: Ord a => Bracket a -> a # sum :: Num a => Bracket a -> a # product :: Num a => Bracket a -> a #
Foldable Splice
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Splice m -> m # foldMap :: Monoid m => (a -> m) -> Splice a -> m # foldr :: (a -> b -> b) -> b -> Splice a -> b # foldr' :: (a -> b -> b) -> b -> Splice a -> b # foldl :: (b -> a -> b) -> b -> Splice a -> b # foldl' :: (b -> a -> b) -> b -> Splice a -> b # foldr1 :: (a -> a -> a) -> Splice a -> a # foldl1 :: (a -> a -> a) -> Splice a -> a # toList :: Splice a -> [a] # null :: Splice a -> Bool # length :: Splice a -> Int # elem :: Eq a => a -> Splice a -> Bool # maximum :: Ord a => Splice a -> a # minimum :: Ord a => Splice a -> a # sum :: Num a => Splice a -> a # product :: Num a => Splice a -> a #
Foldable Safety
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Safety m -> m # foldMap :: Monoid m => (a -> m) -> Safety a -> m # foldr :: (a -> b -> b) -> b -> Safety a -> b # foldr' :: (a -> b -> b) -> b -> Safety a -> b # foldl :: (b -> a -> b) -> b -> Safety a -> b # foldl' :: (b -> a -> b) -> b -> Safety a -> b # foldr1 :: (a -> a -> a) -> Safety a -> a # foldl1 :: (a -> a -> a) -> Safety a -> a # toList :: Safety a -> [a] # null :: Safety a -> Bool # length :: Safety a -> Int # elem :: Eq a => a -> Safety a -> Bool # maximum :: Ord a => Safety a -> a # minimum :: Ord a => Safety a -> a # sum :: Num a => Safety a -> a # product :: Num a => Safety a -> a #
Foldable CallConv
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => CallConv m -> m # foldMap :: Monoid m => (a -> m) -> CallConv a -> m # foldr :: (a -> b -> b) -> b -> CallConv a -> b # foldr' :: (a -> b -> b) -> b -> CallConv a -> b # foldl :: (b -> a -> b) -> b -> CallConv a -> b # foldl' :: (b -> a -> b) -> b -> CallConv a -> b # foldr1 :: (a -> a -> a) -> CallConv a -> a # foldl1 :: (a -> a -> a) -> CallConv a -> a # toList :: CallConv a -> [a] # null :: CallConv a -> Bool # length :: CallConv a -> Int # elem :: Eq a => a -> CallConv a -> Bool # maximum :: Ord a => CallConv a -> a # minimum :: Ord a => CallConv a -> a # sum :: Num a => CallConv a -> a # product :: Num a => CallConv a -> a #
Foldable ModulePragma
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => ModulePragma m -> m # foldMap :: Monoid m => (a -> m) -> ModulePragma a -> m # foldr :: (a -> b -> b) -> b -> ModulePragma a -> b # foldr' :: (a -> b -> b) -> b -> ModulePragma a -> b # foldl :: (b -> a -> b) -> b -> ModulePragma a -> b # foldl' :: (b -> a -> b) -> b -> ModulePragma a -> b # foldr1 :: (a -> a -> a) -> ModulePragma a -> a # foldl1 :: (a -> a -> a) -> ModulePragma a -> a # toList :: ModulePragma a -> [a] # null :: ModulePragma a -> Bool # length :: ModulePragma a -> Int # elem :: Eq a => a -> ModulePragma a -> Bool # maximum :: Ord a => ModulePragma a -> a # minimum :: Ord a => ModulePragma a -> a # sum :: Num a => ModulePragma a -> a # product :: Num a => ModulePragma a -> a #
Foldable Overlap
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Overlap m -> m # foldMap :: Monoid m => (a -> m) -> Overlap a -> m # foldr :: (a -> b -> b) -> b -> Overlap a -> b # foldr' :: (a -> b -> b) -> b -> Overlap a -> b # foldl :: (b -> a -> b) -> b -> Overlap a -> b # foldl' :: (b -> a -> b) -> b -> Overlap a -> b # foldr1 :: (a -> a -> a) -> Overlap a -> a # foldl1 :: (a -> a -> a) -> Overlap a -> a # toList :: Overlap a -> [a] # null :: Overlap a -> Bool # length :: Overlap a -> Int # elem :: Eq a => a -> Overlap a -> Bool # maximum :: Ord a => Overlap a -> a # minimum :: Ord a => Overlap a -> a # sum :: Num a => Overlap a -> a # product :: Num a => Overlap a -> a #
Foldable Activation
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Activation m -> m # foldMap :: Monoid m => (a -> m) -> Activation a -> m # foldr :: (a -> b -> b) -> b -> Activation a -> b # foldr' :: (a -> b -> b) -> b -> Activation a -> b # foldl :: (b -> a -> b) -> b -> Activation a -> b # foldl' :: (b -> a -> b) -> b -> Activation a -> b # foldr1 :: (a -> a -> a) -> Activation a -> a # foldl1 :: (a -> a -> a) -> Activation a -> a # toList :: Activation a -> [a] # null :: Activation a -> Bool # length :: Activation a -> Int # elem :: Eq a => a -> Activation a -> Bool # maximum :: Ord a => Activation a -> a # minimum :: Ord a => Activation a -> a # sum :: Num a => Activation a -> a # product :: Num a => Activation a -> a #
Foldable Rule
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Rule m -> m # foldMap :: Monoid m => (a -> m) -> Rule a -> m # foldr :: (a -> b -> b) -> b -> Rule a -> b # foldr' :: (a -> b -> b) -> b -> Rule a -> b # foldl :: (b -> a -> b) -> b -> Rule a -> b # foldl' :: (b -> a -> b) -> b -> Rule a -> b # foldr1 :: (a -> a -> a) -> Rule a -> a # foldl1 :: (a -> a -> a) -> Rule a -> a # toList :: Rule a -> [a] # null :: Rule a -> Bool # length :: Rule a -> Int # elem :: Eq a => a -> Rule a -> Bool # maximum :: Ord a => Rule a -> a # minimum :: Ord a => Rule a -> a # sum :: Num a => Rule a -> a # product :: Num a => Rule a -> a #
Foldable RuleVar
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => RuleVar m -> m # foldMap :: Monoid m => (a -> m) -> RuleVar a -> m # foldr :: (a -> b -> b) -> b -> RuleVar a -> b # foldr' :: (a -> b -> b) -> b -> RuleVar a -> b # foldl :: (b -> a -> b) -> b -> RuleVar a -> b # foldl' :: (b -> a -> b) -> b -> RuleVar a -> b # foldr1 :: (a -> a -> a) -> RuleVar a -> a # foldl1 :: (a -> a -> a) -> RuleVar a -> a # toList :: RuleVar a -> [a] # null :: RuleVar a -> Bool # length :: RuleVar a -> Int # elem :: Eq a => a -> RuleVar a -> Bool # maximum :: Ord a => RuleVar a -> a # minimum :: Ord a => RuleVar a -> a # sum :: Num a => RuleVar a -> a # product :: Num a => RuleVar a -> a #
Foldable WarningText
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => WarningText m -> m # foldMap :: Monoid m => (a -> m) -> WarningText a -> m # foldr :: (a -> b -> b) -> b -> WarningText a -> b # foldr' :: (a -> b -> b) -> b -> WarningText a -> b # foldl :: (b -> a -> b) -> b -> WarningText a -> b # foldl' :: (b -> a -> b) -> b -> WarningText a -> b # foldr1 :: (a -> a -> a) -> WarningText a -> a # foldl1 :: (a -> a -> a) -> WarningText a -> a # toList :: WarningText a -> [a] # null :: WarningText a -> Bool # length :: WarningText a -> Int # elem :: Eq a => a -> WarningText a -> Bool # maximum :: Ord a => WarningText a -> a # minimum :: Ord a => WarningText a -> a # sum :: Num a => WarningText a -> a # product :: Num a => WarningText a -> a #
Foldable Pat
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Pat m -> m # foldMap :: Monoid m => (a -> m) -> Pat a -> m # foldr :: (a -> b -> b) -> b -> Pat a -> b # foldr' :: (a -> b -> b) -> b -> Pat a -> b # foldl :: (b -> a -> b) -> b -> Pat a -> b # foldl' :: (b -> a -> b) -> b -> Pat a -> b # foldr1 :: (a -> a -> a) -> Pat a -> a # foldl1 :: (a -> a -> a) -> Pat a -> a # toList :: Pat a -> [a] # null :: Pat a -> Bool # length :: Pat a -> Int # elem :: Eq a => a -> Pat a -> Bool # maximum :: Ord a => Pat a -> a # minimum :: Ord a => Pat a -> a # sum :: Num a => Pat a -> a # product :: Num a => Pat a -> a #
Foldable PXAttr
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => PXAttr m -> m # foldMap :: Monoid m => (a -> m) -> PXAttr a -> m # foldr :: (a -> b -> b) -> b -> PXAttr a -> b # foldr' :: (a -> b -> b) -> b -> PXAttr a -> b # foldl :: (b -> a -> b) -> b -> PXAttr a -> b # foldl' :: (b -> a -> b) -> b -> PXAttr a -> b # foldr1 :: (a -> a -> a) -> PXAttr a -> a # foldl1 :: (a -> a -> a) -> PXAttr a -> a # toList :: PXAttr a -> [a] # null :: PXAttr a -> Bool # length :: PXAttr a -> Int # elem :: Eq a => a -> PXAttr a -> Bool # maximum :: Ord a => PXAttr a -> a # minimum :: Ord a => PXAttr a -> a # sum :: Num a => PXAttr a -> a # product :: Num a => PXAttr a -> a #
Foldable RPatOp
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => RPatOp m -> m # foldMap :: Monoid m => (a -> m) -> RPatOp a -> m # foldr :: (a -> b -> b) -> b -> RPatOp a -> b # foldr' :: (a -> b -> b) -> b -> RPatOp a -> b # foldl :: (b -> a -> b) -> b -> RPatOp a -> b # foldl' :: (b -> a -> b) -> b -> RPatOp a -> b # foldr1 :: (a -> a -> a) -> RPatOp a -> a # foldl1 :: (a -> a -> a) -> RPatOp a -> a # toList :: RPatOp a -> [a] # null :: RPatOp a -> Bool # length :: RPatOp a -> Int # elem :: Eq a => a -> RPatOp a -> Bool # maximum :: Ord a => RPatOp a -> a # minimum :: Ord a => RPatOp a -> a # sum :: Num a => RPatOp a -> a # product :: Num a => RPatOp a -> a #
Foldable RPat
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => RPat m -> m # foldMap :: Monoid m => (a -> m) -> RPat a -> m # foldr :: (a -> b -> b) -> b -> RPat a -> b # foldr' :: (a -> b -> b) -> b -> RPat a -> b # foldl :: (b -> a -> b) -> b -> RPat a -> b # foldl' :: (b -> a -> b) -> b -> RPat a -> b # foldr1 :: (a -> a -> a) -> RPat a -> a # foldl1 :: (a -> a -> a) -> RPat a -> a # toList :: RPat a -> [a] # null :: RPat a -> Bool # length :: RPat a -> Int # elem :: Eq a => a -> RPat a -> Bool # maximum :: Ord a => RPat a -> a # minimum :: Ord a => RPat a -> a # sum :: Num a => RPat a -> a # product :: Num a => RPat a -> a #
Foldable PatField
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => PatField m -> m # foldMap :: Monoid m => (a -> m) -> PatField a -> m # foldr :: (a -> b -> b) -> b -> PatField a -> b # foldr' :: (a -> b -> b) -> b -> PatField a -> b # foldl :: (b -> a -> b) -> b -> PatField a -> b # foldl' :: (b -> a -> b) -> b -> PatField a -> b # foldr1 :: (a -> a -> a) -> PatField a -> a # foldl1 :: (a -> a -> a) -> PatField a -> a # toList :: PatField a -> [a] # null :: PatField a -> Bool # length :: PatField a -> Int # elem :: Eq a => a -> PatField a -> Bool # maximum :: Ord a => PatField a -> a # minimum :: Ord a => PatField a -> a # sum :: Num a => PatField a -> a # product :: Num a => PatField a -> a #
Foldable Stmt
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Stmt m -> m # foldMap :: Monoid m => (a -> m) -> Stmt a -> m # foldr :: (a -> b -> b) -> b -> Stmt a -> b # foldr' :: (a -> b -> b) -> b -> Stmt a -> b # foldl :: (b -> a -> b) -> b -> Stmt a -> b # foldl' :: (b -> a -> b) -> b -> Stmt a -> b # foldr1 :: (a -> a -> a) -> Stmt a -> a # foldl1 :: (a -> a -> a) -> Stmt a -> a # toList :: Stmt a -> [a] # null :: Stmt a -> Bool # length :: Stmt a -> Int # elem :: Eq a => a -> Stmt a -> Bool # maximum :: Ord a => Stmt a -> a # minimum :: Ord a => Stmt a -> a # sum :: Num a => Stmt a -> a # product :: Num a => Stmt a -> a #
Foldable QualStmt
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => QualStmt m -> m # foldMap :: Monoid m => (a -> m) -> QualStmt a -> m # foldr :: (a -> b -> b) -> b -> QualStmt a -> b # foldr' :: (a -> b -> b) -> b -> QualStmt a -> b # foldl :: (b -> a -> b) -> b -> QualStmt a -> b # foldl' :: (b -> a -> b) -> b -> QualStmt a -> b # foldr1 :: (a -> a -> a) -> QualStmt a -> a # foldl1 :: (a -> a -> a) -> QualStmt a -> a # toList :: QualStmt a -> [a] # null :: QualStmt a -> Bool # length :: QualStmt a -> Int # elem :: Eq a => a -> QualStmt a -> Bool # maximum :: Ord a => QualStmt a -> a # minimum :: Ord a => QualStmt a -> a # sum :: Num a => QualStmt a -> a # product :: Num a => QualStmt a -> a #
Foldable FieldUpdate
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => FieldUpdate m -> m # foldMap :: Monoid m => (a -> m) -> FieldUpdate a -> m # foldr :: (a -> b -> b) -> b -> FieldUpdate a -> b # foldr' :: (a -> b -> b) -> b -> FieldUpdate a -> b # foldl :: (b -> a -> b) -> b -> FieldUpdate a -> b # foldl' :: (b -> a -> b) -> b -> FieldUpdate a -> b # foldr1 :: (a -> a -> a) -> FieldUpdate a -> a # foldl1 :: (a -> a -> a) -> FieldUpdate a -> a # toList :: FieldUpdate a -> [a] # null :: FieldUpdate a -> Bool # length :: FieldUpdate a -> Int # elem :: Eq a => a -> FieldUpdate a -> Bool # maximum :: Ord a => FieldUpdate a -> a # minimum :: Ord a => FieldUpdate a -> a # sum :: Num a => FieldUpdate a -> a # product :: Num a => FieldUpdate a -> a #
Foldable Alt
Instance details Defined in Language.Haskell.Exts.Syntax Methods fold :: Monoid m => Alt m -> m # foldMap :: Monoid m => (a -> m) -> Alt a -> m # foldr :: (a -> b -> b) -> b -> Alt a -> b # foldr' :: (a -> b -> b) -> b -> Alt a -> b # foldl :: (b -> a -> b) -> b -> Alt a -> b # foldl' :: (b -> a -> b) -> b -> Alt a -> b # foldr1 :: (a -> a -> a) -> Alt a -> a # foldl1 :: (a -> a -> a) -> Alt a -> a # toList :: Alt a -> [a] # null :: Alt a -> Bool # length :: Alt a -> Int # elem :: Eq a => a -> Alt a -> Bool # maximum :: Ord a => Alt a -> a # minimum :: Ord a => Alt a -> a # sum :: Num a => Alt a -> a # product :: Num a => Alt a -> a #
Foldable List
Instance details Defined in Data.Aeson.Config.Types Methods fold :: Monoid m => List m -> m # foldMap :: Monoid m => (a -> m) -> List a -> m # foldr :: (a -> b -> b) -> b -> List a -> b # foldr' :: (a -> b -> b) -> b -> List a -> b # foldl :: (b -> a -> b) -> b -> List a -> b # foldl' :: (b -> a -> b) -> b -> List a -> b # foldr1 :: (a -> a -> a) -> List a -> a # foldl1 :: (a -> a -> a) -> List a -> a # toList :: List a -> [a] # null :: List a -> Bool # length :: List a -> Int # elem :: Eq a => a -> List a -> Bool # maximum :: Ord a => List a -> a # minimum :: Ord a => List a -> a # sum :: Num a => List a -> a # product :: Num a => List a -> a #
Foldable Section
Instance details Defined in Hpack.Config Methods fold :: Monoid m => Section m -> m # foldMap :: Monoid m => (a -> m) -> Section a -> m # foldr :: (a -> b -> b) -> b -> Section a -> b # foldr' :: (a -> b -> b) -> b -> Section a -> b # foldl :: (b -> a -> b) -> b -> Section a -> b # foldl' :: (b -> a -> b) -> b -> Section a -> b # foldr1 :: (a -> a -> a) -> Section a -> a # foldl1 :: (a -> a -> a) -> Section a -> a # toList :: Section a -> [a] # null :: Section a -> Bool # length :: Section a -> Int # elem :: Eq a => a -> Section a -> Bool # maximum :: Ord a => Section a -> a # minimum :: Ord a => Section a -> a # sum :: Num a => Section a -> a # product :: Num a => Section a -> a #
Foldable Conditional
Instance details Defined in Hpack.Config Methods fold :: Monoid m => Conditional m -> m # foldMap :: Monoid m => (a -> m) -> Conditional a -> m # foldr :: (a -> b -> b) -> b -> Conditional a -> b # foldr' :: (a -> b -> b) -> b -> Conditional a -> b # foldl :: (b -> a -> b) -> b -> Conditional a -> b # foldl' :: (b -> a -> b) -> b -> Conditional a -> b # foldr1 :: (a -> a -> a) -> Conditional a -> a # foldl1 :: (a -> a -> a) -> Conditional a -> a # toList :: Conditional a -> [a] # null :: Conditional a -> Bool # length :: Conditional a -> Int # elem :: Eq a => a -> Conditional a -> Bool # maximum :: Ord a => Conditional a -> a # minimum :: Ord a => Conditional a -> a # sum :: Num a => Conditional a -> a # product :: Num a => Conditional a -> a #
Foldable HistoriedResponse
Instance details Defined in Network.HTTP.Client Methods fold :: Monoid m => HistoriedResponse m -> m # foldMap :: Monoid m => (a -> m) -> HistoriedResponse a -> m # foldr :: (a -> b -> b) -> b -> HistoriedResponse a -> b # foldr' :: (a -> b -> b) -> b -> HistoriedResponse a -> b # foldl :: (b -> a -> b) -> b -> HistoriedResponse a -> b # foldl' :: (b -> a -> b) -> b -> HistoriedResponse a -> b # foldr1 :: (a -> a -> a) -> HistoriedResponse a -> a # foldl1 :: (a -> a -> a) -> HistoriedResponse a -> a # toList :: HistoriedResponse a -> [a] # null :: HistoriedResponse a -> Bool # length :: HistoriedResponse a -> Int # elem :: Eq a => a -> HistoriedResponse a -> Bool # maximum :: Ord a => HistoriedResponse a -> a # minimum :: Ord a => HistoriedResponse a -> a # sum :: Num a => HistoriedResponse a -> a # product :: Num a => HistoriedResponse a -> a #
Foldable Response
Instance details Defined in Network.HTTP.Client.Types Methods fold :: Monoid m => Response m -> m # foldMap :: Monoid m => (a -> m) -> Response a -> m # foldr :: (a -> b -> b) -> b -> Response a -> b # foldr' :: (a -> b -> b) -> b -> Response a -> b # foldl :: (b -> a -> b) -> b -> Response a -> b # foldl' :: (b -> a -> b) -> b -> Response a -> b # foldr1 :: (a -> a -> a) -> Response a -> a # foldl1 :: (a -> a -> a) -> Response a -> a # toList :: Response a -> [a] # null :: Response a -> Bool # length :: Response a -> Int # elem :: Eq a => a -> Response a -> Bool # maximum :: Ord a => Response a -> a # minimum :: Ord a => Response a -> a # sum :: Num a => Response a -> a # product :: Num a => Response a -> a #
Foldable HashSet
Instance details Defined in Data.HashSet Methods fold :: Monoid m => HashSet m -> m # foldMap :: Monoid m => (a -> m) -> HashSet a -> m # foldr :: (a -> b -> b) -> b -> HashSet a -> b # foldr' :: (a -> b -> b) -> b -> HashSet a -> b # foldl :: (b -> a -> b) -> b -> HashSet a -> b # foldl' :: (b -> a -> b) -> b -> HashSet a -> b # foldr1 :: (a -> a -> a) -> HashSet a -> a # foldl1 :: (a -> a -> a) -> HashSet a -> a # toList :: HashSet a -> [a] # null :: HashSet a -> Bool # length :: HashSet a -> Int # elem :: Eq a => a -> HashSet a -> Bool # maximum :: Ord a => HashSet a -> a # minimum :: Ord a => HashSet a -> a # sum :: Num a => HashSet a -> a # product :: Num a => HashSet a -> a #
Foldable Vector
Instance details Defined in Data.Vector Methods fold :: Monoid m => Vector m -> m # foldMap :: Monoid m => (a -> m) -> Vector a -> m # foldr :: (a -> b -> b) -> b -> Vector a -> b # foldr' :: (a -> b -> b) -> b -> Vector a -> b # foldl :: (b -> a -> b) -> b -> Vector a -> b # foldl' :: (b -> a -> b) -> b -> Vector a -> b # foldr1 :: (a -> a -> a) -> Vector a -> a # foldl1 :: (a -> a -> a) -> Vector a -> a # toList :: Vector a -> [a] # null :: Vector a -> Bool # length :: Vector a -> Int # elem :: Eq a => a -> Vector a -> Bool # maximum :: Ord a => Vector a -> a # minimum :: Ord a => Vector a -> a # sum :: Num a => Vector a -> a # product :: Num a => Vector a -> a #
Foldable PointedList
Instance details Defined in Data.List.PointedList Methods fold :: Monoid m => PointedList m -> m # foldMap :: Monoid m => (a -> m) -> PointedList a -> m # foldr :: (a -> b -> b) -> b -> PointedList a -> b # foldr' :: (a -> b -> b) -> b -> PointedList a -> b # foldl :: (b -> a -> b) -> b -> PointedList a -> b # foldl' :: (b -> a -> b) -> b -> PointedList a -> b # foldr1 :: (a -> a -> a) -> PointedList a -> a # foldl1 :: (a -> a -> a) -> PointedList a -> a # toList :: PointedList a -> [a] # null :: PointedList a -> Bool # length :: PointedList a -> Int # elem :: Eq a => a -> PointedList a -> Bool # maximum :: Ord a => PointedList a -> a # minimum :: Ord a => PointedList a -> a # sum :: Num a => PointedList a -> a # product :: Num a => PointedList a -> a #
Foldable SmallArray
Instance details Defined in Data.Primitive.SmallArray Methods fold :: Monoid m => SmallArray m -> m # foldMap :: Monoid m => (a -> m) -> SmallArray a -> m # foldr :: (a -> b -> b) -> b -> SmallArray a -> b # foldr' :: (a -> b -> b) -> b -> SmallArray a -> b # foldl :: (b -> a -> b) -> b -> SmallArray a -> b # foldl' :: (b -> a -> b) -> b -> SmallArray a -> b # foldr1 :: (a -> a -> a) -> SmallArray a -> a # foldl1 :: (a -> a -> a) -> SmallArray a -> a # toList :: SmallArray a -> [a] # null :: SmallArray a -> Bool # length :: SmallArray a -> Int # elem :: Eq a => a -> SmallArray a -> Bool # maximum :: Ord a => SmallArray a -> a # minimum :: Ord a => SmallArray a -> a # sum :: Num a => SmallArray a -> a # product :: Num a => SmallArray a -> a #
Foldable Array
Instance details Defined in Data.Primitive.Array Methods fold :: Monoid m => Array m -> m # foldMap :: Monoid m => (a -> m) -> Array a -> m # foldr :: (a -> b -> b) -> b -> Array a -> b # foldr' :: (a -> b -> b) -> b -> Array a -> b # foldl :: (b -> a -> b) -> b -> Array a -> b # foldl' :: (b -> a -> b) -> b -> Array a -> b # foldr1 :: (a -> a -> a) -> Array a -> a # foldl1 :: (a -> a -> a) -> Array a -> a # toList :: Array a -> [a] # null :: Array a -> Bool # length :: Array a -> Int # elem :: Eq a => a -> Array a -> Bool # maximum :: Ord a => Array a -> a # minimum :: Ord a => Array a -> a # sum :: Num a => Array a -> a # product :: Num a => Array a -> a #
Foldable (Either a)	Since: base-4.7.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Either a m -> m # foldMap :: Monoid m => (a0 -> m) -> Either a a0 -> m # foldr :: (a0 -> b -> b) -> b -> Either a a0 -> b # foldr' :: (a0 -> b -> b) -> b -> Either a a0 -> b # foldl :: (b -> a0 -> b) -> b -> Either a a0 -> b # foldl' :: (b -> a0 -> b) -> b -> Either a a0 -> b # foldr1 :: (a0 -> a0 -> a0) -> Either a a0 -> a0 # foldl1 :: (a0 -> a0 -> a0) -> Either a a0 -> a0 # toList :: Either a a0 -> [a0] # null :: Either a a0 -> Bool # length :: Either a a0 -> Int # elem :: Eq a0 => a0 -> Either a a0 -> Bool # maximum :: Ord a0 => Either a a0 -> a0 # minimum :: Ord a0 => Either a a0 -> a0 # sum :: Num a0 => Either a a0 -> a0 # product :: Num a0 => Either a a0 -> a0 #
Foldable (V1 :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => V1 m -> m # foldMap :: Monoid m => (a -> m) -> V1 a -> m # foldr :: (a -> b -> b) -> b -> V1 a -> b # foldr' :: (a -> b -> b) -> b -> V1 a -> b # foldl :: (b -> a -> b) -> b -> V1 a -> b # foldl' :: (b -> a -> b) -> b -> V1 a -> b # foldr1 :: (a -> a -> a) -> V1 a -> a # foldl1 :: (a -> a -> a) -> V1 a -> a # toList :: V1 a -> [a] # null :: V1 a -> Bool # length :: V1 a -> Int # elem :: Eq a => a -> V1 a -> Bool # maximum :: Ord a => V1 a -> a # minimum :: Ord a => V1 a -> a # sum :: Num a => V1 a -> a # product :: Num a => V1 a -> a #
Foldable (U1 :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => U1 m -> m # foldMap :: Monoid m => (a -> m) -> U1 a -> m # foldr :: (a -> b -> b) -> b -> U1 a -> b # foldr' :: (a -> b -> b) -> b -> U1 a -> b # foldl :: (b -> a -> b) -> b -> U1 a -> b # foldl' :: (b -> a -> b) -> b -> U1 a -> b # foldr1 :: (a -> a -> a) -> U1 a -> a # foldl1 :: (a -> a -> a) -> U1 a -> a # toList :: U1 a -> [a] # null :: U1 a -> Bool # length :: U1 a -> Int # elem :: Eq a => a -> U1 a -> Bool # maximum :: Ord a => U1 a -> a # minimum :: Ord a => U1 a -> a # sum :: Num a => U1 a -> a # product :: Num a => U1 a -> a #
Foldable ((,) a)	Since: base-4.7.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => (a, m) -> m # foldMap :: Monoid m => (a0 -> m) -> (a, a0) -> m # foldr :: (a0 -> b -> b) -> b -> (a, a0) -> b # foldr' :: (a0 -> b -> b) -> b -> (a, a0) -> b # foldl :: (b -> a0 -> b) -> b -> (a, a0) -> b # foldl' :: (b -> a0 -> b) -> b -> (a, a0) -> b # foldr1 :: (a0 -> a0 -> a0) -> (a, a0) -> a0 # foldl1 :: (a0 -> a0 -> a0) -> (a, a0) -> a0 # toList :: (a, a0) -> [a0] # null :: (a, a0) -> Bool # length :: (a, a0) -> Int # elem :: Eq a0 => a0 -> (a, a0) -> Bool # maximum :: Ord a0 => (a, a0) -> a0 # minimum :: Ord a0 => (a, a0) -> a0 # sum :: Num a0 => (a, a0) -> a0 # product :: Num a0 => (a, a0) -> a0 #
Foldable (Map k)
Instance details Defined in Data.Map.Internal Methods fold :: Monoid m => Map k m -> m # foldMap :: Monoid m => (a -> m) -> Map k a -> m # foldr :: (a -> b -> b) -> b -> Map k a -> b # foldr' :: (a -> b -> b) -> b -> Map k a -> b # foldl :: (b -> a -> b) -> b -> Map k a -> b # foldl' :: (b -> a -> b) -> b -> Map k a -> b # foldr1 :: (a -> a -> a) -> Map k a -> a # foldl1 :: (a -> a -> a) -> Map k a -> a # toList :: Map k a -> [a] # null :: Map k a -> Bool # length :: Map k a -> Int # elem :: Eq a => a -> Map k a -> Bool # maximum :: Ord a => Map k a -> a # minimum :: Ord a => Map k a -> a # sum :: Num a => Map k a -> a # product :: Num a => Map k a -> a #
Foldable (HashMap k)
Instance details Defined in Data.HashMap.Base Methods fold :: Monoid m => HashMap k m -> m # foldMap :: Monoid m => (a -> m) -> HashMap k a -> m # foldr :: (a -> b -> b) -> b -> HashMap k a -> b # foldr' :: (a -> b -> b) -> b -> HashMap k a -> b # foldl :: (b -> a -> b) -> b -> HashMap k a -> b # foldl' :: (b -> a -> b) -> b -> HashMap k a -> b # foldr1 :: (a -> a -> a) -> HashMap k a -> a # foldl1 :: (a -> a -> a) -> HashMap k a -> a # toList :: HashMap k a -> [a] # null :: HashMap k a -> Bool # length :: HashMap k a -> Int # elem :: Eq a => a -> HashMap k a -> Bool # maximum :: Ord a => HashMap k a -> a # minimum :: Ord a => HashMap k a -> a # sum :: Num a => HashMap k a -> a # product :: Num a => HashMap k a -> a #
Foldable (Array i)	Since: base-4.8.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Array i m -> m # foldMap :: Monoid m => (a -> m) -> Array i a -> m # foldr :: (a -> b -> b) -> b -> Array i a -> b # foldr' :: (a -> b -> b) -> b -> Array i a -> b # foldl :: (b -> a -> b) -> b -> Array i a -> b # foldl' :: (b -> a -> b) -> b -> Array i a -> b # foldr1 :: (a -> a -> a) -> Array i a -> a # foldl1 :: (a -> a -> a) -> Array i a -> a # toList :: Array i a -> [a] # null :: Array i a -> Bool # length :: Array i a -> Int # elem :: Eq a => a -> Array i a -> Bool # maximum :: Ord a => Array i a -> a # minimum :: Ord a => Array i a -> a # sum :: Num a => Array i a -> a # product :: Num a => Array i a -> a #
Foldable (Arg a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fold :: Monoid m => Arg a m -> m # foldMap :: Monoid m => (a0 -> m) -> Arg a a0 -> m # foldr :: (a0 -> b -> b) -> b -> Arg a a0 -> b # foldr' :: (a0 -> b -> b) -> b -> Arg a a0 -> b # foldl :: (b -> a0 -> b) -> b -> Arg a a0 -> b # foldl' :: (b -> a0 -> b) -> b -> Arg a a0 -> b # foldr1 :: (a0 -> a0 -> a0) -> Arg a a0 -> a0 # foldl1 :: (a0 -> a0 -> a0) -> Arg a a0 -> a0 # toList :: Arg a a0 -> [a0] # null :: Arg a a0 -> Bool # length :: Arg a a0 -> Int # elem :: Eq a0 => a0 -> Arg a a0 -> Bool # maximum :: Ord a0 => Arg a a0 -> a0 # minimum :: Ord a0 => Arg a a0 -> a0 # sum :: Num a0 => Arg a a0 -> a0 # product :: Num a0 => Arg a a0 -> a0 #
Foldable (Proxy :: Type -> Type)	Since: base-4.7.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Proxy m -> m # foldMap :: Monoid m => (a -> m) -> Proxy a -> m # foldr :: (a -> b -> b) -> b -> Proxy a -> b # foldr' :: (a -> b -> b) -> b -> Proxy a -> b # foldl :: (b -> a -> b) -> b -> Proxy a -> b # foldl' :: (b -> a -> b) -> b -> Proxy a -> b # foldr1 :: (a -> a -> a) -> Proxy a -> a # foldl1 :: (a -> a -> a) -> Proxy a -> a # toList :: Proxy a -> [a] # null :: Proxy a -> Bool # length :: Proxy a -> Int # elem :: Eq a => a -> Proxy a -> Bool # maximum :: Ord a => Proxy a -> a # minimum :: Ord a => Proxy a -> a # sum :: Num a => Proxy a -> a # product :: Num a => Proxy a -> a #
Foldable (Product a)
Instance details Defined in Data.Aeson.Config.Types Methods fold :: Monoid m => Product a m -> m # foldMap :: Monoid m => (a0 -> m) -> Product a a0 -> m # foldr :: (a0 -> b -> b) -> b -> Product a a0 -> b # foldr' :: (a0 -> b -> b) -> b -> Product a a0 -> b # foldl :: (b -> a0 -> b) -> b -> Product a a0 -> b # foldl' :: (b -> a0 -> b) -> b -> Product a a0 -> b # foldr1 :: (a0 -> a0 -> a0) -> Product a a0 -> a0 # foldl1 :: (a0 -> a0 -> a0) -> Product a a0 -> a0 # toList :: Product a a0 -> [a0] # null :: Product a a0 -> Bool # length :: Product a a0 -> Int # elem :: Eq a0 => a0 -> Product a a0 -> Bool # maximum :: Ord a0 => Product a a0 -> a0 # minimum :: Ord a0 => Product a a0 -> a0 # sum :: Num a0 => Product a a0 -> a0 # product :: Num a0 => Product a a0 -> a0 #
Foldable f => Foldable (Rec1 f)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Rec1 f m -> m # foldMap :: Monoid m => (a -> m) -> Rec1 f a -> m # foldr :: (a -> b -> b) -> b -> Rec1 f a -> b # foldr' :: (a -> b -> b) -> b -> Rec1 f a -> b # foldl :: (b -> a -> b) -> b -> Rec1 f a -> b # foldl' :: (b -> a -> b) -> b -> Rec1 f a -> b # foldr1 :: (a -> a -> a) -> Rec1 f a -> a # foldl1 :: (a -> a -> a) -> Rec1 f a -> a # toList :: Rec1 f a -> [a] # null :: Rec1 f a -> Bool # length :: Rec1 f a -> Int # elem :: Eq a => a -> Rec1 f a -> Bool # maximum :: Ord a => Rec1 f a -> a # minimum :: Ord a => Rec1 f a -> a # sum :: Num a => Rec1 f a -> a # product :: Num a => Rec1 f a -> a #
Foldable (URec Char :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => URec Char m -> m # foldMap :: Monoid m => (a -> m) -> URec Char a -> m # foldr :: (a -> b -> b) -> b -> URec Char a -> b # foldr' :: (a -> b -> b) -> b -> URec Char a -> b # foldl :: (b -> a -> b) -> b -> URec Char a -> b # foldl' :: (b -> a -> b) -> b -> URec Char a -> b # foldr1 :: (a -> a -> a) -> URec Char a -> a # foldl1 :: (a -> a -> a) -> URec Char a -> a # toList :: URec Char a -> [a] # null :: URec Char a -> Bool # length :: URec Char a -> Int # elem :: Eq a => a -> URec Char a -> Bool # maximum :: Ord a => URec Char a -> a # minimum :: Ord a => URec Char a -> a # sum :: Num a => URec Char a -> a # product :: Num a => URec Char a -> a #
Foldable (URec Double :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => URec Double m -> m # foldMap :: Monoid m => (a -> m) -> URec Double a -> m # foldr :: (a -> b -> b) -> b -> URec Double a -> b # foldr' :: (a -> b -> b) -> b -> URec Double a -> b # foldl :: (b -> a -> b) -> b -> URec Double a -> b # foldl' :: (b -> a -> b) -> b -> URec Double a -> b # foldr1 :: (a -> a -> a) -> URec Double a -> a # foldl1 :: (a -> a -> a) -> URec Double a -> a # toList :: URec Double a -> [a] # null :: URec Double a -> Bool # length :: URec Double a -> Int # elem :: Eq a => a -> URec Double a -> Bool # maximum :: Ord a => URec Double a -> a # minimum :: Ord a => URec Double a -> a # sum :: Num a => URec Double a -> a # product :: Num a => URec Double a -> a #
Foldable (URec Float :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => URec Float m -> m # foldMap :: Monoid m => (a -> m) -> URec Float a -> m # foldr :: (a -> b -> b) -> b -> URec Float a -> b # foldr' :: (a -> b -> b) -> b -> URec Float a -> b # foldl :: (b -> a -> b) -> b -> URec Float a -> b # foldl' :: (b -> a -> b) -> b -> URec Float a -> b # foldr1 :: (a -> a -> a) -> URec Float a -> a # foldl1 :: (a -> a -> a) -> URec Float a -> a # toList :: URec Float a -> [a] # null :: URec Float a -> Bool # length :: URec Float a -> Int # elem :: Eq a => a -> URec Float a -> Bool # maximum :: Ord a => URec Float a -> a # minimum :: Ord a => URec Float a -> a # sum :: Num a => URec Float a -> a # product :: Num a => URec Float a -> a #
Foldable (URec Int :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => URec Int m -> m # foldMap :: Monoid m => (a -> m) -> URec Int a -> m # foldr :: (a -> b -> b) -> b -> URec Int a -> b # foldr' :: (a -> b -> b) -> b -> URec Int a -> b # foldl :: (b -> a -> b) -> b -> URec Int a -> b # foldl' :: (b -> a -> b) -> b -> URec Int a -> b # foldr1 :: (a -> a -> a) -> URec Int a -> a # foldl1 :: (a -> a -> a) -> URec Int a -> a # toList :: URec Int a -> [a] # null :: URec Int a -> Bool # length :: URec Int a -> Int # elem :: Eq a => a -> URec Int a -> Bool # maximum :: Ord a => URec Int a -> a # minimum :: Ord a => URec Int a -> a # sum :: Num a => URec Int a -> a # product :: Num a => URec Int a -> a #
Foldable (URec Word :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => URec Word m -> m # foldMap :: Monoid m => (a -> m) -> URec Word a -> m # foldr :: (a -> b -> b) -> b -> URec Word a -> b # foldr' :: (a -> b -> b) -> b -> URec Word a -> b # foldl :: (b -> a -> b) -> b -> URec Word a -> b # foldl' :: (b -> a -> b) -> b -> URec Word a -> b # foldr1 :: (a -> a -> a) -> URec Word a -> a # foldl1 :: (a -> a -> a) -> URec Word a -> a # toList :: URec Word a -> [a] # null :: URec Word a -> Bool # length :: URec Word a -> Int # elem :: Eq a => a -> URec Word a -> Bool # maximum :: Ord a => URec Word a -> a # minimum :: Ord a => URec Word a -> a # sum :: Num a => URec Word a -> a # product :: Num a => URec Word a -> a #
Foldable (URec (Ptr ()) :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => URec (Ptr ()) m -> m # foldMap :: Monoid m => (a -> m) -> URec (Ptr ()) a -> m # foldr :: (a -> b -> b) -> b -> URec (Ptr ()) a -> b # foldr' :: (a -> b -> b) -> b -> URec (Ptr ()) a -> b # foldl :: (b -> a -> b) -> b -> URec (Ptr ()) a -> b # foldl' :: (b -> a -> b) -> b -> URec (Ptr ()) a -> b # foldr1 :: (a -> a -> a) -> URec (Ptr ()) a -> a # foldl1 :: (a -> a -> a) -> URec (Ptr ()) a -> a # toList :: URec (Ptr ()) a -> [a] # null :: URec (Ptr ()) a -> Bool # length :: URec (Ptr ()) a -> Int # elem :: Eq a => a -> URec (Ptr ()) a -> Bool # maximum :: Ord a => URec (Ptr ()) a -> a # minimum :: Ord a => URec (Ptr ()) a -> a # sum :: Num a => URec (Ptr ()) a -> a # product :: Num a => URec (Ptr ()) a -> a #
Foldable (Const m :: Type -> Type)	Since: base-4.7.0.0
Instance details Defined in Data.Functor.Const Methods fold :: Monoid m0 => Const m m0 -> m0 # foldMap :: Monoid m0 => (a -> m0) -> Const m a -> m0 # foldr :: (a -> b -> b) -> b -> Const m a -> b # foldr' :: (a -> b -> b) -> b -> Const m a -> b # foldl :: (b -> a -> b) -> b -> Const m a -> b # foldl' :: (b -> a -> b) -> b -> Const m a -> b # foldr1 :: (a -> a -> a) -> Const m a -> a # foldl1 :: (a -> a -> a) -> Const m a -> a # toList :: Const m a -> [a] # null :: Const m a -> Bool # length :: Const m a -> Int # elem :: Eq a => a -> Const m a -> Bool # maximum :: Ord a => Const m a -> a # minimum :: Ord a => Const m a -> a # sum :: Num a => Const m a -> a # product :: Num a => Const m a -> a #
Foldable f => Foldable (Ap f)	Since: base-4.12.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Ap f m -> m # foldMap :: Monoid m => (a -> m) -> Ap f a -> m # foldr :: (a -> b -> b) -> b -> Ap f a -> b # foldr' :: (a -> b -> b) -> b -> Ap f a -> b # foldl :: (b -> a -> b) -> b -> Ap f a -> b # foldl' :: (b -> a -> b) -> b -> Ap f a -> b # foldr1 :: (a -> a -> a) -> Ap f a -> a # foldl1 :: (a -> a -> a) -> Ap f a -> a # toList :: Ap f a -> [a] # null :: Ap f a -> Bool # length :: Ap f a -> Int # elem :: Eq a => a -> Ap f a -> Bool # maximum :: Ord a => Ap f a -> a # minimum :: Ord a => Ap f a -> a # sum :: Num a => Ap f a -> a # product :: Num a => Ap f a -> a #
Foldable f => Foldable (Alt f)	Since: base-4.12.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Alt f m -> m # foldMap :: Monoid m => (a -> m) -> Alt f a -> m # foldr :: (a -> b -> b) -> b -> Alt f a -> b # foldr' :: (a -> b -> b) -> b -> Alt f a -> b # foldl :: (b -> a -> b) -> b -> Alt f a -> b # foldl' :: (b -> a -> b) -> b -> Alt f a -> b # foldr1 :: (a -> a -> a) -> Alt f a -> a # foldl1 :: (a -> a -> a) -> Alt f a -> a # toList :: Alt f a -> [a] # null :: Alt f a -> Bool # length :: Alt f a -> Int # elem :: Eq a => a -> Alt f a -> Bool # maximum :: Ord a => Alt f a -> a # minimum :: Ord a => Alt f a -> a # sum :: Num a => Alt f a -> a # product :: Num a => Alt f a -> a #
Foldable f => Foldable (ExceptT e f)
Instance details Defined in Control.Monad.Trans.Except Methods fold :: Monoid m => ExceptT e f m -> m # foldMap :: Monoid m => (a -> m) -> ExceptT e f a -> m # foldr :: (a -> b -> b) -> b -> ExceptT e f a -> b # foldr' :: (a -> b -> b) -> b -> ExceptT e f a -> b # foldl :: (b -> a -> b) -> b -> ExceptT e f a -> b # foldl' :: (b -> a -> b) -> b -> ExceptT e f a -> b # foldr1 :: (a -> a -> a) -> ExceptT e f a -> a # foldl1 :: (a -> a -> a) -> ExceptT e f a -> a # toList :: ExceptT e f a -> [a] # null :: ExceptT e f a -> Bool # length :: ExceptT e f a -> Int # elem :: Eq a => a -> ExceptT e f a -> Bool # maximum :: Ord a => ExceptT e f a -> a # minimum :: Ord a => ExceptT e f a -> a # sum :: Num a => ExceptT e f a -> a # product :: Num a => ExceptT e f a -> a #
Foldable f => Foldable (ErrorT e f)
Instance details Defined in Control.Monad.Trans.Error Methods fold :: Monoid m => ErrorT e f m -> m # foldMap :: Monoid m => (a -> m) -> ErrorT e f a -> m # foldr :: (a -> b -> b) -> b -> ErrorT e f a -> b # foldr' :: (a -> b -> b) -> b -> ErrorT e f a -> b # foldl :: (b -> a -> b) -> b -> ErrorT e f a -> b # foldl' :: (b -> a -> b) -> b -> ErrorT e f a -> b # foldr1 :: (a -> a -> a) -> ErrorT e f a -> a # foldl1 :: (a -> a -> a) -> ErrorT e f a -> a # toList :: ErrorT e f a -> [a] # null :: ErrorT e f a -> Bool # length :: ErrorT e f a -> Int # elem :: Eq a => a -> ErrorT e f a -> Bool # maximum :: Ord a => ErrorT e f a -> a # minimum :: Ord a => ErrorT e f a -> a # sum :: Num a => ErrorT e f a -> a # product :: Num a => ErrorT e f a -> a #
Foldable (Tagged s)
Instance details Defined in Data.Tagged Methods fold :: Monoid m => Tagged s m -> m # foldMap :: Monoid m => (a -> m) -> Tagged s a -> m # foldr :: (a -> b -> b) -> b -> Tagged s a -> b # foldr' :: (a -> b -> b) -> b -> Tagged s a -> b # foldl :: (b -> a -> b) -> b -> Tagged s a -> b # foldl' :: (b -> a -> b) -> b -> Tagged s a -> b # foldr1 :: (a -> a -> a) -> Tagged s a -> a # foldl1 :: (a -> a -> a) -> Tagged s a -> a # toList :: Tagged s a -> [a] # null :: Tagged s a -> Bool # length :: Tagged s a -> Int # elem :: Eq a => a -> Tagged s a -> Bool # maximum :: Ord a => Tagged s a -> a # minimum :: Ord a => Tagged s a -> a # sum :: Num a => Tagged s a -> a # product :: Num a => Tagged s a -> a #
Foldable (K1 i c :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => K1 i c m -> m # foldMap :: Monoid m => (a -> m) -> K1 i c a -> m # foldr :: (a -> b -> b) -> b -> K1 i c a -> b # foldr' :: (a -> b -> b) -> b -> K1 i c a -> b # foldl :: (b -> a -> b) -> b -> K1 i c a -> b # foldl' :: (b -> a -> b) -> b -> K1 i c a -> b # foldr1 :: (a -> a -> a) -> K1 i c a -> a # foldl1 :: (a -> a -> a) -> K1 i c a -> a # toList :: K1 i c a -> [a] # null :: K1 i c a -> Bool # length :: K1 i c a -> Int # elem :: Eq a => a -> K1 i c a -> Bool # maximum :: Ord a => K1 i c a -> a # minimum :: Ord a => K1 i c a -> a # sum :: Num a => K1 i c a -> a # product :: Num a => K1 i c a -> a #
(Foldable f, Foldable g) => Foldable (f :+: g)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => (f :+: g) m -> m # foldMap :: Monoid m => (a -> m) -> (f :+: g) a -> m # foldr :: (a -> b -> b) -> b -> (f :+: g) a -> b # foldr' :: (a -> b -> b) -> b -> (f :+: g) a -> b # foldl :: (b -> a -> b) -> b -> (f :+: g) a -> b # foldl' :: (b -> a -> b) -> b -> (f :+: g) a -> b # foldr1 :: (a -> a -> a) -> (f :+: g) a -> a # foldl1 :: (a -> a -> a) -> (f :+: g) a -> a # toList :: (f :+: g) a -> [a] # null :: (f :+: g) a -> Bool # length :: (f :+: g) a -> Int # elem :: Eq a => a -> (f :+: g) a -> Bool # maximum :: Ord a => (f :+: g) a -> a # minimum :: Ord a => (f :+: g) a -> a # sum :: Num a => (f :+: g) a -> a # product :: Num a => (f :+: g) a -> a #
(Foldable f, Foldable g) => Foldable (f :*: g)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => (f :: g) m -> m # foldMap :: Monoid m => (a -> m) -> (f :: g) a -> m # foldr :: (a -> b -> b) -> b -> (f :: g) a -> b # foldr' :: (a -> b -> b) -> b -> (f :: g) a -> b # foldl :: (b -> a -> b) -> b -> (f :: g) a -> b # foldl' :: (b -> a -> b) -> b -> (f :: g) a -> b # foldr1 :: (a -> a -> a) -> (f :: g) a -> a # foldl1 :: (a -> a -> a) -> (f :: g) a -> a # toList :: (f :: g) a -> [a] # null :: (f :: g) a -> Bool # length :: (f :: g) a -> Int # elem :: Eq a => a -> (f :: g) a -> Bool # maximum :: Ord a => (f :: g) a -> a # minimum :: Ord a => (f :: g) a -> a # sum :: Num a => (f :: g) a -> a # product :: Num a => (f :: g) a -> a #
(Foldable f, Foldable g) => Foldable (Product f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Product Methods fold :: Monoid m => Product f g m -> m # foldMap :: Monoid m => (a -> m) -> Product f g a -> m # foldr :: (a -> b -> b) -> b -> Product f g a -> b # foldr' :: (a -> b -> b) -> b -> Product f g a -> b # foldl :: (b -> a -> b) -> b -> Product f g a -> b # foldl' :: (b -> a -> b) -> b -> Product f g a -> b # foldr1 :: (a -> a -> a) -> Product f g a -> a # foldl1 :: (a -> a -> a) -> Product f g a -> a # toList :: Product f g a -> [a] # null :: Product f g a -> Bool # length :: Product f g a -> Int # elem :: Eq a => a -> Product f g a -> Bool # maximum :: Ord a => Product f g a -> a # minimum :: Ord a => Product f g a -> a # sum :: Num a => Product f g a -> a # product :: Num a => Product f g a -> a #
(Foldable f, Foldable g) => Foldable (Sum f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Sum Methods fold :: Monoid m => Sum f g m -> m # foldMap :: Monoid m => (a -> m) -> Sum f g a -> m # foldr :: (a -> b -> b) -> b -> Sum f g a -> b # foldr' :: (a -> b -> b) -> b -> Sum f g a -> b # foldl :: (b -> a -> b) -> b -> Sum f g a -> b # foldl' :: (b -> a -> b) -> b -> Sum f g a -> b # foldr1 :: (a -> a -> a) -> Sum f g a -> a # foldl1 :: (a -> a -> a) -> Sum f g a -> a # toList :: Sum f g a -> [a] # null :: Sum f g a -> Bool # length :: Sum f g a -> Int # elem :: Eq a => a -> Sum f g a -> Bool # maximum :: Ord a => Sum f g a -> a # minimum :: Ord a => Sum f g a -> a # sum :: Num a => Sum f g a -> a # product :: Num a => Sum f g a -> a #
Foldable f => Foldable (M1 i c f)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => M1 i c f m -> m # foldMap :: Monoid m => (a -> m) -> M1 i c f a -> m # foldr :: (a -> b -> b) -> b -> M1 i c f a -> b # foldr' :: (a -> b -> b) -> b -> M1 i c f a -> b # foldl :: (b -> a -> b) -> b -> M1 i c f a -> b # foldl' :: (b -> a -> b) -> b -> M1 i c f a -> b # foldr1 :: (a -> a -> a) -> M1 i c f a -> a # foldl1 :: (a -> a -> a) -> M1 i c f a -> a # toList :: M1 i c f a -> [a] # null :: M1 i c f a -> Bool # length :: M1 i c f a -> Int # elem :: Eq a => a -> M1 i c f a -> Bool # maximum :: Ord a => M1 i c f a -> a # minimum :: Ord a => M1 i c f a -> a # sum :: Num a => M1 i c f a -> a # product :: Num a => M1 i c f a -> a #
(Foldable f, Foldable g) => Foldable (f :.: g)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => (f :.: g) m -> m # foldMap :: Monoid m => (a -> m) -> (f :.: g) a -> m # foldr :: (a -> b -> b) -> b -> (f :.: g) a -> b # foldr' :: (a -> b -> b) -> b -> (f :.: g) a -> b # foldl :: (b -> a -> b) -> b -> (f :.: g) a -> b # foldl' :: (b -> a -> b) -> b -> (f :.: g) a -> b # foldr1 :: (a -> a -> a) -> (f :.: g) a -> a # foldl1 :: (a -> a -> a) -> (f :.: g) a -> a # toList :: (f :.: g) a -> [a] # null :: (f :.: g) a -> Bool # length :: (f :.: g) a -> Int # elem :: Eq a => a -> (f :.: g) a -> Bool # maximum :: Ord a => (f :.: g) a -> a # minimum :: Ord a => (f :.: g) a -> a # sum :: Num a => (f :.: g) a -> a # product :: Num a => (f :.: g) a -> a #
(Foldable f, Foldable g) => Foldable (Compose f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Compose Methods fold :: Monoid m => Compose f g m -> m # foldMap :: Monoid m => (a -> m) -> Compose f g a -> m # foldr :: (a -> b -> b) -> b -> Compose f g a -> b # foldr' :: (a -> b -> b) -> b -> Compose f g a -> b # foldl :: (b -> a -> b) -> b -> Compose f g a -> b # foldl' :: (b -> a -> b) -> b -> Compose f g a -> b # foldr1 :: (a -> a -> a) -> Compose f g a -> a # foldl1 :: (a -> a -> a) -> Compose f g a -> a # toList :: Compose f g a -> [a] # null :: Compose f g a -> Bool # length :: Compose f g a -> Int # elem :: Eq a => a -> Compose f g a -> Bool # maximum :: Ord a => Compose f g a -> a # minimum :: Ord a => Compose f g a -> a # sum :: Num a => Compose f g a -> a # product :: Num a => Compose f g a -> a #
Foldable g => Foldable (Joker g a)
Instance details Defined in Data.Bifunctor.Joker Methods fold :: Monoid m => Joker g a m -> m # foldMap :: Monoid m => (a0 -> m) -> Joker g a a0 -> m # foldr :: (a0 -> b -> b) -> b -> Joker g a a0 -> b # foldr' :: (a0 -> b -> b) -> b -> Joker g a a0 -> b # foldl :: (b -> a0 -> b) -> b -> Joker g a a0 -> b # foldl' :: (b -> a0 -> b) -> b -> Joker g a a0 -> b # foldr1 :: (a0 -> a0 -> a0) -> Joker g a a0 -> a0 # foldl1 :: (a0 -> a0 -> a0) -> Joker g a a0 -> a0 # toList :: Joker g a a0 -> [a0] # null :: Joker g a a0 -> Bool # length :: Joker g a a0 -> Int # elem :: Eq a0 => a0 -> Joker g a a0 -> Bool # maximum :: Ord a0 => Joker g a a0 -> a0 # minimum :: Ord a0 => Joker g a a0 -> a0 # sum :: Num a0 => Joker g a a0 -> a0 # product :: Num a0 => Joker g a a0 -> a0 #
Foldable (Clown f a :: Type -> Type)
Instance details Defined in Data.Bifunctor.Clown Methods fold :: Monoid m => Clown f a m -> m # foldMap :: Monoid m => (a0 -> m) -> Clown f a a0 -> m # foldr :: (a0 -> b -> b) -> b -> Clown f a a0 -> b # foldr' :: (a0 -> b -> b) -> b -> Clown f a a0 -> b # foldl :: (b -> a0 -> b) -> b -> Clown f a a0 -> b # foldl' :: (b -> a0 -> b) -> b -> Clown f a a0 -> b # foldr1 :: (a0 -> a0 -> a0) -> Clown f a a0 -> a0 # foldl1 :: (a0 -> a0 -> a0) -> Clown f a a0 -> a0 # toList :: Clown f a a0 -> [a0] # null :: Clown f a a0 -> Bool # length :: Clown f a a0 -> Int # elem :: Eq a0 => a0 -> Clown f a a0 -> Bool # maximum :: Ord a0 => Clown f a a0 -> a0 # minimum :: Ord a0 => Clown f a a0 -> a0 # sum :: Num a0 => Clown f a a0 -> a0 # product :: Num a0 => Clown f a a0 -> a0 #
(Foldable f, Bifoldable p) => Foldable (Tannen f p a)
Instance details Defined in Data.Bifunctor.Tannen Methods fold :: Monoid m => Tannen f p a m -> m # foldMap :: Monoid m => (a0 -> m) -> Tannen f p a a0 -> m # foldr :: (a0 -> b -> b) -> b -> Tannen f p a a0 -> b # foldr' :: (a0 -> b -> b) -> b -> Tannen f p a a0 -> b # foldl :: (b -> a0 -> b) -> b -> Tannen f p a a0 -> b # foldl' :: (b -> a0 -> b) -> b -> Tannen f p a a0 -> b # foldr1 :: (a0 -> a0 -> a0) -> Tannen f p a a0 -> a0 # foldl1 :: (a0 -> a0 -> a0) -> Tannen f p a a0 -> a0 # toList :: Tannen f p a a0 -> [a0] # null :: Tannen f p a a0 -> Bool # length :: Tannen f p a a0 -> Int # elem :: Eq a0 => a0 -> Tannen f p a a0 -> Bool # maximum :: Ord a0 => Tannen f p a a0 -> a0 # minimum :: Ord a0 => Tannen f p a a0 -> a0 # sum :: Num a0 => Tannen f p a a0 -> a0 # product :: Num a0 => Tannen f p a a0 -> a0 #
(Bifoldable p, Foldable g) => Foldable (Biff p f g a)
Instance details Defined in Data.Bifunctor.Biff Methods fold :: Monoid m => Biff p f g a m -> m # foldMap :: Monoid m => (a0 -> m) -> Biff p f g a a0 -> m # foldr :: (a0 -> b -> b) -> b -> Biff p f g a a0 -> b # foldr' :: (a0 -> b -> b) -> b -> Biff p f g a a0 -> b # foldl :: (b -> a0 -> b) -> b -> Biff p f g a a0 -> b # foldl' :: (b -> a0 -> b) -> b -> Biff p f g a a0 -> b # foldr1 :: (a0 -> a0 -> a0) -> Biff p f g a a0 -> a0 # foldl1 :: (a0 -> a0 -> a0) -> Biff p f g a a0 -> a0 # toList :: Biff p f g a a0 -> [a0] # null :: Biff p f g a a0 -> Bool # length :: Biff p f g a a0 -> Int # elem :: Eq a0 => a0 -> Biff p f g a a0 -> Bool # maximum :: Ord a0 => Biff p f g a a0 -> a0 # minimum :: Ord a0 => Biff p f g a a0 -> a0 # sum :: Num a0 => Biff p f g a a0 -> a0 # product :: Num a0 => Biff p f g a a0 -> a0 #

class (Functor t, Foldable t) => Traversable (t :: Type -> Type) where #

Functors representing data structures that can be traversed from left to right.

A definition of traverse must satisfy the following laws:

naturality: t . traverse f = traverse (t . f) for every applicative transformation t
identity: traverse Identity = Identity
composition: traverse (Compose . fmap g . f) = Compose . fmap (traverse g) . traverse f

A definition of sequenceA must satisfy the following laws:

naturality: t . sequenceA = sequenceA . fmap t for every applicative transformation t
identity: sequenceA . fmap Identity = Identity
composition: sequenceA . fmap Compose = Compose . fmap sequenceA . sequenceA

where an applicative transformation is a function

t :: (Applicative f, Applicative g) => f a -> g a

preserving the Applicative operations, i.e.

```
t (pure x) = pure x
```
```
t (x <*> y) = t x <*> t y
```

and the identity functor Identity and composition of functors Compose are defined as

  newtype Identity a = Identity a

  instance Functor Identity where
    fmap f (Identity x) = Identity (f x)

  instance Applicative Identity where
    pure x = Identity x
    Identity f <*> Identity x = Identity (f x)

  newtype Compose f g a = Compose (f (g a))

  instance (Functor f, Functor g) => Functor (Compose f g) where
    fmap f (Compose x) = Compose (fmap (fmap f) x)

  instance (Applicative f, Applicative g) => Applicative (Compose f g) where
    pure x = Compose (pure (pure x))
    Compose f <*> Compose x = Compose ((<*>) <$> f <*> x)

(The naturality law is implied by parametricity.)

Instances are similar to Functor, e.g. given a data type

data Tree a = Empty | Leaf a | Node (Tree a) a (Tree a)

a suitable instance would be

instance Traversable Tree where
   traverse f Empty = pure Empty
   traverse f (Leaf x) = Leaf <$> f x
   traverse f (Node l k r) = Node <$> traverse f l <*> f k <*> traverse f r

This is suitable even for abstract types, as the laws for <*> imply a form of associativity.

The superclass instances should satisfy the following:

In the Functor instance, fmap should be equivalent to traversal with the identity applicative functor (fmapDefault).
In the Foldable instance, foldMap should be equivalent to traversal with a constant applicative functor (foldMapDefault).

Minimal complete definition

traverse | sequenceA

Methods

traverse :: Applicative f => (a -> f b) -> t a -> f (t b) #

Map each element of a structure to an action, evaluate these actions from left to right, and collect the results. For a version that ignores the results see traverse_.

sequenceA :: Applicative f => t (f a) -> f (t a) #

Evaluate each action in the structure from left to right, and collect the results. For a version that ignores the results see sequenceA_.

mapM :: Monad m => (a -> m b) -> t a -> m (t b) #

Map each element of a structure to a monadic action, evaluate these actions from left to right, and collect the results. For a version that ignores the results see mapM_.

sequence :: Monad m => t (m a) -> m (t a) #

Evaluate each monadic action in the structure from left to right, and collect the results. For a version that ignores the results see sequence_.

Instances

Traversable []	Since: base-2.1
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> [a] -> f [b] # sequenceA :: Applicative f => [f a] -> f [a] # mapM :: Monad m => (a -> m b) -> [a] -> m [b] # sequence :: Monad m => [m a] -> m [a] #
Traversable Maybe	Since: base-2.1
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Maybe a -> f (Maybe b) # sequenceA :: Applicative f => Maybe (f a) -> f (Maybe a) # mapM :: Monad m => (a -> m b) -> Maybe a -> m (Maybe b) # sequence :: Monad m => Maybe (m a) -> m (Maybe a) #
Traversable Par1	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Par1 a -> f (Par1 b) # sequenceA :: Applicative f => Par1 (f a) -> f (Par1 a) # mapM :: Monad m => (a -> m b) -> Par1 a -> m (Par1 b) # sequence :: Monad m => Par1 (m a) -> m (Par1 a) #
Traversable Last	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods traverse :: Applicative f => (a -> f b) -> Last a -> f (Last b) # sequenceA :: Applicative f => Last (f a) -> f (Last a) # mapM :: Monad m => (a -> m b) -> Last a -> m (Last b) # sequence :: Monad m => Last (m a) -> m (Last a) #
Traversable VersionRangeF
Instance details Defined in Distribution.Types.VersionRange Methods traverse :: Applicative f => (a -> f b) -> VersionRangeF a -> f (VersionRangeF b) # sequenceA :: Applicative f => VersionRangeF (f a) -> f (VersionRangeF a) # mapM :: Monad m => (a -> m b) -> VersionRangeF a -> m (VersionRangeF b) # sequence :: Monad m => VersionRangeF (m a) -> m (VersionRangeF a) #
Traversable SCC	Since: containers-0.5.9
Instance details Defined in Data.Graph Methods traverse :: Applicative f => (a -> f b) -> SCC a -> f (SCC b) # sequenceA :: Applicative f => SCC (f a) -> f (SCC a) # mapM :: Monad m => (a -> m b) -> SCC a -> m (SCC b) # sequence :: Monad m => SCC (m a) -> m (SCC a) #
Traversable Identity	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Identity a -> f (Identity b) # sequenceA :: Applicative f => Identity (f a) -> f (Identity a) # mapM :: Monad m => (a -> m b) -> Identity a -> m (Identity b) # sequence :: Monad m => Identity (m a) -> m (Identity a) #
Traversable ZipList	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> ZipList a -> f (ZipList b) # sequenceA :: Applicative f => ZipList (f a) -> f (ZipList a) # mapM :: Monad m => (a -> m b) -> ZipList a -> m (ZipList b) # sequence :: Monad m => ZipList (m a) -> m (ZipList a) #
Traversable IResult
Instance details Defined in Data.Aeson.Types.Internal Methods traverse :: Applicative f => (a -> f b) -> IResult a -> f (IResult b) # sequenceA :: Applicative f => IResult (f a) -> f (IResult a) # mapM :: Monad m => (a -> m b) -> IResult a -> m (IResult b) # sequence :: Monad m => IResult (m a) -> m (IResult a) #
Traversable Result
Instance details Defined in Data.Aeson.Types.Internal Methods traverse :: Applicative f => (a -> f b) -> Result a -> f (Result b) # sequenceA :: Applicative f => Result (f a) -> f (Result a) # mapM :: Monad m => (a -> m b) -> Result a -> m (Result b) # sequence :: Monad m => Result (m a) -> m (Result a) #
Traversable Complex	Since: base-4.9.0.0
Instance details Defined in Data.Complex Methods traverse :: Applicative f => (a -> f b) -> Complex a -> f (Complex b) # sequenceA :: Applicative f => Complex (f a) -> f (Complex a) # mapM :: Monad m => (a -> m b) -> Complex a -> m (Complex b) # sequence :: Monad m => Complex (m a) -> m (Complex a) #
Traversable Min	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods traverse :: Applicative f => (a -> f b) -> Min a -> f (Min b) # sequenceA :: Applicative f => Min (f a) -> f (Min a) # mapM :: Monad m => (a -> m b) -> Min a -> m (Min b) # sequence :: Monad m => Min (m a) -> m (Min a) #
Traversable Max	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods traverse :: Applicative f => (a -> f b) -> Max a -> f (Max b) # sequenceA :: Applicative f => Max (f a) -> f (Max a) # mapM :: Monad m => (a -> m b) -> Max a -> m (Max b) # sequence :: Monad m => Max (m a) -> m (Max a) #
Traversable First	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods traverse :: Applicative f => (a -> f b) -> First a -> f (First b) # sequenceA :: Applicative f => First (f a) -> f (First a) # mapM :: Monad m => (a -> m b) -> First a -> m (First b) # sequence :: Monad m => First (m a) -> m (First a) #
Traversable Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods traverse :: Applicative f => (a -> f b) -> Option a -> f (Option b) # sequenceA :: Applicative f => Option (f a) -> f (Option a) # mapM :: Monad m => (a -> m b) -> Option a -> m (Option b) # sequence :: Monad m => Option (m a) -> m (Option a) #
Traversable First	Since: base-4.8.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> First a -> f (First b) # sequenceA :: Applicative f => First (f a) -> f (First a) # mapM :: Monad m => (a -> m b) -> First a -> m (First b) # sequence :: Monad m => First (m a) -> m (First a) #
Traversable Last	Since: base-4.8.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Last a -> f (Last b) # sequenceA :: Applicative f => Last (f a) -> f (Last a) # mapM :: Monad m => (a -> m b) -> Last a -> m (Last b) # sequence :: Monad m => Last (m a) -> m (Last a) #
Traversable Dual	Since: base-4.8.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Dual a -> f (Dual b) # sequenceA :: Applicative f => Dual (f a) -> f (Dual a) # mapM :: Monad m => (a -> m b) -> Dual a -> m (Dual b) # sequence :: Monad m => Dual (m a) -> m (Dual a) #
Traversable Sum	Since: base-4.8.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Sum a -> f (Sum b) # sequenceA :: Applicative f => Sum (f a) -> f (Sum a) # mapM :: Monad m => (a -> m b) -> Sum a -> m (Sum b) # sequence :: Monad m => Sum (m a) -> m (Sum a) #
Traversable Product	Since: base-4.8.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Product a -> f (Product b) # sequenceA :: Applicative f => Product (f a) -> f (Product a) # mapM :: Monad m => (a -> m b) -> Product a -> m (Product b) # sequence :: Monad m => Product (m a) -> m (Product a) #
Traversable Down	Since: base-4.12.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Down a -> f (Down b) # sequenceA :: Applicative f => Down (f a) -> f (Down a) # mapM :: Monad m => (a -> m b) -> Down a -> m (Down b) # sequence :: Monad m => Down (m a) -> m (Down a) #
Traversable NonEmpty	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> NonEmpty a -> f (NonEmpty b) # sequenceA :: Applicative f => NonEmpty (f a) -> f (NonEmpty a) # mapM :: Monad m => (a -> m b) -> NonEmpty a -> m (NonEmpty b) # sequence :: Monad m => NonEmpty (m a) -> m (NonEmpty a) #
Traversable IntMap
Instance details Defined in Data.IntMap.Internal Methods traverse :: Applicative f => (a -> f b) -> IntMap a -> f (IntMap b) # sequenceA :: Applicative f => IntMap (f a) -> f (IntMap a) # mapM :: Monad m => (a -> m b) -> IntMap a -> m (IntMap b) # sequence :: Monad m => IntMap (m a) -> m (IntMap a) #
Traversable Tree
Instance details Defined in Data.Tree Methods traverse :: Applicative f => (a -> f b) -> Tree a -> f (Tree b) # sequenceA :: Applicative f => Tree (f a) -> f (Tree a) # mapM :: Monad m => (a -> m b) -> Tree a -> m (Tree b) # sequence :: Monad m => Tree (m a) -> m (Tree a) #
Traversable Seq
Instance details Defined in Data.Sequence.Internal Methods traverse :: Applicative f => (a -> f b) -> Seq a -> f (Seq b) # sequenceA :: Applicative f => Seq (f a) -> f (Seq a) # mapM :: Monad m => (a -> m b) -> Seq a -> m (Seq b) # sequence :: Monad m => Seq (m a) -> m (Seq a) #
Traversable FingerTree
Instance details Defined in Data.Sequence.Internal Methods traverse :: Applicative f => (a -> f b) -> FingerTree a -> f (FingerTree b) # sequenceA :: Applicative f => FingerTree (f a) -> f (FingerTree a) # mapM :: Monad m => (a -> m b) -> FingerTree a -> m (FingerTree b) # sequence :: Monad m => FingerTree (m a) -> m (FingerTree a) #
Traversable Digit
Instance details Defined in Data.Sequence.Internal Methods traverse :: Applicative f => (a -> f b) -> Digit a -> f (Digit b) # sequenceA :: Applicative f => Digit (f a) -> f (Digit a) # mapM :: Monad m => (a -> m b) -> Digit a -> m (Digit b) # sequence :: Monad m => Digit (m a) -> m (Digit a) #
Traversable Node
Instance details Defined in Data.Sequence.Internal Methods traverse :: Applicative f => (a -> f b) -> Node a -> f (Node b) # sequenceA :: Applicative f => Node (f a) -> f (Node a) # mapM :: Monad m => (a -> m b) -> Node a -> m (Node b) # sequence :: Monad m => Node (m a) -> m (Node a) #
Traversable Elem
Instance details Defined in Data.Sequence.Internal Methods traverse :: Applicative f => (a -> f b) -> Elem a -> f (Elem b) # sequenceA :: Applicative f => Elem (f a) -> f (Elem a) # mapM :: Monad m => (a -> m b) -> Elem a -> m (Elem b) # sequence :: Monad m => Elem (m a) -> m (Elem a) #
Traversable ViewL
Instance details Defined in Data.Sequence.Internal Methods traverse :: Applicative f => (a -> f b) -> ViewL a -> f (ViewL b) # sequenceA :: Applicative f => ViewL (f a) -> f (ViewL a) # mapM :: Monad m => (a -> m b) -> ViewL a -> m (ViewL b) # sequence :: Monad m => ViewL (m a) -> m (ViewL a) #
Traversable ViewR
Instance details Defined in Data.Sequence.Internal Methods traverse :: Applicative f => (a -> f b) -> ViewR a -> f (ViewR b) # sequenceA :: Applicative f => ViewR (f a) -> f (ViewR a) # mapM :: Monad m => (a -> m b) -> ViewR a -> m (ViewR b) # sequence :: Monad m => ViewR (m a) -> m (ViewR a) #
Traversable Name
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Name a -> f (Name b) # sequenceA :: Applicative f => Name (f a) -> f (Name a) # mapM :: Monad m => (a -> m b) -> Name a -> m (Name b) # sequence :: Monad m => Name (m a) -> m (Name a) #
Traversable Scoped
Instance details Defined in Language.Haskell.Names.Types Methods traverse :: Applicative f => (a -> f b) -> Scoped a -> f (Scoped b) # sequenceA :: Applicative f => Scoped (f a) -> f (Scoped a) # mapM :: Monad m => (a -> m b) -> Scoped a -> m (Scoped b) # sequence :: Monad m => Scoped (m a) -> m (Scoped a) #
Traversable NameInfo
Instance details Defined in Language.Haskell.Names.Types Methods traverse :: Applicative f => (a -> f b) -> NameInfo a -> f (NameInfo b) # sequenceA :: Applicative f => NameInfo (f a) -> f (NameInfo a) # mapM :: Monad m => (a -> m b) -> NameInfo a -> m (NameInfo b) # sequence :: Monad m => NameInfo (m a) -> m (NameInfo a) #
Traversable Error
Instance details Defined in Language.Haskell.Names.Types Methods traverse :: Applicative f => (a -> f b) -> Error a -> f (Error b) # sequenceA :: Applicative f => Error (f a) -> f (Error a) # mapM :: Monad m => (a -> m b) -> Error a -> m (Error b) # sequence :: Monad m => Error (m a) -> m (Error a) #
Traversable ModuleName
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> ModuleName a -> f (ModuleName b) # sequenceA :: Applicative f => ModuleName (f a) -> f (ModuleName a) # mapM :: Monad m => (a -> m b) -> ModuleName a -> m (ModuleName b) # sequence :: Monad m => ModuleName (m a) -> m (ModuleName a) #
Traversable SpecialCon
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> SpecialCon a -> f (SpecialCon b) # sequenceA :: Applicative f => SpecialCon (f a) -> f (SpecialCon a) # mapM :: Monad m => (a -> m b) -> SpecialCon a -> m (SpecialCon b) # sequence :: Monad m => SpecialCon (m a) -> m (SpecialCon a) #
Traversable QName
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> QName a -> f (QName b) # sequenceA :: Applicative f => QName (f a) -> f (QName a) # mapM :: Monad m => (a -> m b) -> QName a -> m (QName b) # sequence :: Monad m => QName (m a) -> m (QName a) #
Traversable IPName
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> IPName a -> f (IPName b) # sequenceA :: Applicative f => IPName (f a) -> f (IPName a) # mapM :: Monad m => (a -> m b) -> IPName a -> m (IPName b) # sequence :: Monad m => IPName (m a) -> m (IPName a) #
Traversable QOp
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> QOp a -> f (QOp b) # sequenceA :: Applicative f => QOp (f a) -> f (QOp a) # mapM :: Monad m => (a -> m b) -> QOp a -> m (QOp b) # sequence :: Monad m => QOp (m a) -> m (QOp a) #
Traversable Op
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Op a -> f (Op b) # sequenceA :: Applicative f => Op (f a) -> f (Op a) # mapM :: Monad m => (a -> m b) -> Op a -> m (Op b) # sequence :: Monad m => Op (m a) -> m (Op a) #
Traversable CName
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> CName a -> f (CName b) # sequenceA :: Applicative f => CName (f a) -> f (CName a) # mapM :: Monad m => (a -> m b) -> CName a -> m (CName b) # sequence :: Monad m => CName (m a) -> m (CName a) #
Traversable Module
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Module a -> f (Module b) # sequenceA :: Applicative f => Module (f a) -> f (Module a) # mapM :: Monad m => (a -> m b) -> Module a -> m (Module b) # sequence :: Monad m => Module (m a) -> m (Module a) #
Traversable ModuleHead
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> ModuleHead a -> f (ModuleHead b) # sequenceA :: Applicative f => ModuleHead (f a) -> f (ModuleHead a) # mapM :: Monad m => (a -> m b) -> ModuleHead a -> m (ModuleHead b) # sequence :: Monad m => ModuleHead (m a) -> m (ModuleHead a) #
Traversable ExportSpecList
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> ExportSpecList a -> f (ExportSpecList b) # sequenceA :: Applicative f => ExportSpecList (f a) -> f (ExportSpecList a) # mapM :: Monad m => (a -> m b) -> ExportSpecList a -> m (ExportSpecList b) # sequence :: Monad m => ExportSpecList (m a) -> m (ExportSpecList a) #
Traversable ExportSpec
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> ExportSpec a -> f (ExportSpec b) # sequenceA :: Applicative f => ExportSpec (f a) -> f (ExportSpec a) # mapM :: Monad m => (a -> m b) -> ExportSpec a -> m (ExportSpec b) # sequence :: Monad m => ExportSpec (m a) -> m (ExportSpec a) #
Traversable EWildcard
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> EWildcard a -> f (EWildcard b) # sequenceA :: Applicative f => EWildcard (f a) -> f (EWildcard a) # mapM :: Monad m => (a -> m b) -> EWildcard a -> m (EWildcard b) # sequence :: Monad m => EWildcard (m a) -> m (EWildcard a) #
Traversable Namespace
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Namespace a -> f (Namespace b) # sequenceA :: Applicative f => Namespace (f a) -> f (Namespace a) # mapM :: Monad m => (a -> m b) -> Namespace a -> m (Namespace b) # sequence :: Monad m => Namespace (m a) -> m (Namespace a) #
Traversable ImportDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> ImportDecl a -> f (ImportDecl b) # sequenceA :: Applicative f => ImportDecl (f a) -> f (ImportDecl a) # mapM :: Monad m => (a -> m b) -> ImportDecl a -> m (ImportDecl b) # sequence :: Monad m => ImportDecl (m a) -> m (ImportDecl a) #
Traversable ImportSpecList
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> ImportSpecList a -> f (ImportSpecList b) # sequenceA :: Applicative f => ImportSpecList (f a) -> f (ImportSpecList a) # mapM :: Monad m => (a -> m b) -> ImportSpecList a -> m (ImportSpecList b) # sequence :: Monad m => ImportSpecList (m a) -> m (ImportSpecList a) #
Traversable ImportSpec
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> ImportSpec a -> f (ImportSpec b) # sequenceA :: Applicative f => ImportSpec (f a) -> f (ImportSpec a) # mapM :: Monad m => (a -> m b) -> ImportSpec a -> m (ImportSpec b) # sequence :: Monad m => ImportSpec (m a) -> m (ImportSpec a) #
Traversable Assoc
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Assoc a -> f (Assoc b) # sequenceA :: Applicative f => Assoc (f a) -> f (Assoc a) # mapM :: Monad m => (a -> m b) -> Assoc a -> m (Assoc b) # sequence :: Monad m => Assoc (m a) -> m (Assoc a) #
Traversable Decl
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Decl a -> f (Decl b) # sequenceA :: Applicative f => Decl (f a) -> f (Decl a) # mapM :: Monad m => (a -> m b) -> Decl a -> m (Decl b) # sequence :: Monad m => Decl (m a) -> m (Decl a) #
Traversable PatternSynDirection
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> PatternSynDirection a -> f (PatternSynDirection b) # sequenceA :: Applicative f => PatternSynDirection (f a) -> f (PatternSynDirection a) # mapM :: Monad m => (a -> m b) -> PatternSynDirection a -> m (PatternSynDirection b) # sequence :: Monad m => PatternSynDirection (m a) -> m (PatternSynDirection a) #
Traversable TypeEqn
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> TypeEqn a -> f (TypeEqn b) # sequenceA :: Applicative f => TypeEqn (f a) -> f (TypeEqn a) # mapM :: Monad m => (a -> m b) -> TypeEqn a -> m (TypeEqn b) # sequence :: Monad m => TypeEqn (m a) -> m (TypeEqn a) #
Traversable Annotation
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Annotation a -> f (Annotation b) # sequenceA :: Applicative f => Annotation (f a) -> f (Annotation a) # mapM :: Monad m => (a -> m b) -> Annotation a -> m (Annotation b) # sequence :: Monad m => Annotation (m a) -> m (Annotation a) #
Traversable BooleanFormula
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> BooleanFormula a -> f (BooleanFormula b) # sequenceA :: Applicative f => BooleanFormula (f a) -> f (BooleanFormula a) # mapM :: Monad m => (a -> m b) -> BooleanFormula a -> m (BooleanFormula b) # sequence :: Monad m => BooleanFormula (m a) -> m (BooleanFormula a) #
Traversable Role
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Role a -> f (Role b) # sequenceA :: Applicative f => Role (f a) -> f (Role a) # mapM :: Monad m => (a -> m b) -> Role a -> m (Role b) # sequence :: Monad m => Role (m a) -> m (Role a) #
Traversable DataOrNew
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> DataOrNew a -> f (DataOrNew b) # sequenceA :: Applicative f => DataOrNew (f a) -> f (DataOrNew a) # mapM :: Monad m => (a -> m b) -> DataOrNew a -> m (DataOrNew b) # sequence :: Monad m => DataOrNew (m a) -> m (DataOrNew a) #
Traversable InjectivityInfo
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> InjectivityInfo a -> f (InjectivityInfo b) # sequenceA :: Applicative f => InjectivityInfo (f a) -> f (InjectivityInfo a) # mapM :: Monad m => (a -> m b) -> InjectivityInfo a -> m (InjectivityInfo b) # sequence :: Monad m => InjectivityInfo (m a) -> m (InjectivityInfo a) #
Traversable ResultSig
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> ResultSig a -> f (ResultSig b) # sequenceA :: Applicative f => ResultSig (f a) -> f (ResultSig a) # mapM :: Monad m => (a -> m b) -> ResultSig a -> m (ResultSig b) # sequence :: Monad m => ResultSig (m a) -> m (ResultSig a) #
Traversable DeclHead
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> DeclHead a -> f (DeclHead b) # sequenceA :: Applicative f => DeclHead (f a) -> f (DeclHead a) # mapM :: Monad m => (a -> m b) -> DeclHead a -> m (DeclHead b) # sequence :: Monad m => DeclHead (m a) -> m (DeclHead a) #
Traversable InstRule
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> InstRule a -> f (InstRule b) # sequenceA :: Applicative f => InstRule (f a) -> f (InstRule a) # mapM :: Monad m => (a -> m b) -> InstRule a -> m (InstRule b) # sequence :: Monad m => InstRule (m a) -> m (InstRule a) #
Traversable InstHead
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> InstHead a -> f (InstHead b) # sequenceA :: Applicative f => InstHead (f a) -> f (InstHead a) # mapM :: Monad m => (a -> m b) -> InstHead a -> m (InstHead b) # sequence :: Monad m => InstHead (m a) -> m (InstHead a) #
Traversable Deriving
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Deriving a -> f (Deriving b) # sequenceA :: Applicative f => Deriving (f a) -> f (Deriving a) # mapM :: Monad m => (a -> m b) -> Deriving a -> m (Deriving b) # sequence :: Monad m => Deriving (m a) -> m (Deriving a) #
Traversable DerivStrategy
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> DerivStrategy a -> f (DerivStrategy b) # sequenceA :: Applicative f => DerivStrategy (f a) -> f (DerivStrategy a) # mapM :: Monad m => (a -> m b) -> DerivStrategy a -> m (DerivStrategy b) # sequence :: Monad m => DerivStrategy (m a) -> m (DerivStrategy a) #
Traversable Binds
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Binds a -> f (Binds b) # sequenceA :: Applicative f => Binds (f a) -> f (Binds a) # mapM :: Monad m => (a -> m b) -> Binds a -> m (Binds b) # sequence :: Monad m => Binds (m a) -> m (Binds a) #
Traversable IPBind
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> IPBind a -> f (IPBind b) # sequenceA :: Applicative f => IPBind (f a) -> f (IPBind a) # mapM :: Monad m => (a -> m b) -> IPBind a -> m (IPBind b) # sequence :: Monad m => IPBind (m a) -> m (IPBind a) #
Traversable Match
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Match a -> f (Match b) # sequenceA :: Applicative f => Match (f a) -> f (Match a) # mapM :: Monad m => (a -> m b) -> Match a -> m (Match b) # sequence :: Monad m => Match (m a) -> m (Match a) #
Traversable QualConDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> QualConDecl a -> f (QualConDecl b) # sequenceA :: Applicative f => QualConDecl (f a) -> f (QualConDecl a) # mapM :: Monad m => (a -> m b) -> QualConDecl a -> m (QualConDecl b) # sequence :: Monad m => QualConDecl (m a) -> m (QualConDecl a) #
Traversable ConDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> ConDecl a -> f (ConDecl b) # sequenceA :: Applicative f => ConDecl (f a) -> f (ConDecl a) # mapM :: Monad m => (a -> m b) -> ConDecl a -> m (ConDecl b) # sequence :: Monad m => ConDecl (m a) -> m (ConDecl a) #
Traversable FieldDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> FieldDecl a -> f (FieldDecl b) # sequenceA :: Applicative f => FieldDecl (f a) -> f (FieldDecl a) # mapM :: Monad m => (a -> m b) -> FieldDecl a -> m (FieldDecl b) # sequence :: Monad m => FieldDecl (m a) -> m (FieldDecl a) #
Traversable GadtDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> GadtDecl a -> f (GadtDecl b) # sequenceA :: Applicative f => GadtDecl (f a) -> f (GadtDecl a) # mapM :: Monad m => (a -> m b) -> GadtDecl a -> m (GadtDecl b) # sequence :: Monad m => GadtDecl (m a) -> m (GadtDecl a) #
Traversable ClassDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> ClassDecl a -> f (ClassDecl b) # sequenceA :: Applicative f => ClassDecl (f a) -> f (ClassDecl a) # mapM :: Monad m => (a -> m b) -> ClassDecl a -> m (ClassDecl b) # sequence :: Monad m => ClassDecl (m a) -> m (ClassDecl a) #
Traversable InstDecl
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> InstDecl a -> f (InstDecl b) # sequenceA :: Applicative f => InstDecl (f a) -> f (InstDecl a) # mapM :: Monad m => (a -> m b) -> InstDecl a -> m (InstDecl b) # sequence :: Monad m => InstDecl (m a) -> m (InstDecl a) #
Traversable BangType
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> BangType a -> f (BangType b) # sequenceA :: Applicative f => BangType (f a) -> f (BangType a) # mapM :: Monad m => (a -> m b) -> BangType a -> m (BangType b) # sequence :: Monad m => BangType (m a) -> m (BangType a) #
Traversable Unpackedness
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Unpackedness a -> f (Unpackedness b) # sequenceA :: Applicative f => Unpackedness (f a) -> f (Unpackedness a) # mapM :: Monad m => (a -> m b) -> Unpackedness a -> m (Unpackedness b) # sequence :: Monad m => Unpackedness (m a) -> m (Unpackedness a) #
Traversable Rhs
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Rhs a -> f (Rhs b) # sequenceA :: Applicative f => Rhs (f a) -> f (Rhs a) # mapM :: Monad m => (a -> m b) -> Rhs a -> m (Rhs b) # sequence :: Monad m => Rhs (m a) -> m (Rhs a) #
Traversable GuardedRhs
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> GuardedRhs a -> f (GuardedRhs b) # sequenceA :: Applicative f => GuardedRhs (f a) -> f (GuardedRhs a) # mapM :: Monad m => (a -> m b) -> GuardedRhs a -> m (GuardedRhs b) # sequence :: Monad m => GuardedRhs (m a) -> m (GuardedRhs a) #
Traversable Type
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Type a -> f (Type b) # sequenceA :: Applicative f => Type (f a) -> f (Type a) # mapM :: Monad m => (a -> m b) -> Type a -> m (Type b) # sequence :: Monad m => Type (m a) -> m (Type a) #
Traversable MaybePromotedName
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> MaybePromotedName a -> f (MaybePromotedName b) # sequenceA :: Applicative f => MaybePromotedName (f a) -> f (MaybePromotedName a) # mapM :: Monad m => (a -> m b) -> MaybePromotedName a -> m (MaybePromotedName b) # sequence :: Monad m => MaybePromotedName (m a) -> m (MaybePromotedName a) #
Traversable Promoted
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Promoted a -> f (Promoted b) # sequenceA :: Applicative f => Promoted (f a) -> f (Promoted a) # mapM :: Monad m => (a -> m b) -> Promoted a -> m (Promoted b) # sequence :: Monad m => Promoted (m a) -> m (Promoted a) #
Traversable TyVarBind
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> TyVarBind a -> f (TyVarBind b) # sequenceA :: Applicative f => TyVarBind (f a) -> f (TyVarBind a) # mapM :: Monad m => (a -> m b) -> TyVarBind a -> m (TyVarBind b) # sequence :: Monad m => TyVarBind (m a) -> m (TyVarBind a) #
Traversable Kind
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Kind a -> f (Kind b) # sequenceA :: Applicative f => Kind (f a) -> f (Kind a) # mapM :: Monad m => (a -> m b) -> Kind a -> m (Kind b) # sequence :: Monad m => Kind (m a) -> m (Kind a) #
Traversable FunDep
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> FunDep a -> f (FunDep b) # sequenceA :: Applicative f => FunDep (f a) -> f (FunDep a) # mapM :: Monad m => (a -> m b) -> FunDep a -> m (FunDep b) # sequence :: Monad m => FunDep (m a) -> m (FunDep a) #
Traversable Context
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Context a -> f (Context b) # sequenceA :: Applicative f => Context (f a) -> f (Context a) # mapM :: Monad m => (a -> m b) -> Context a -> m (Context b) # sequence :: Monad m => Context (m a) -> m (Context a) #
Traversable Asst
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Asst a -> f (Asst b) # sequenceA :: Applicative f => Asst (f a) -> f (Asst a) # mapM :: Monad m => (a -> m b) -> Asst a -> m (Asst b) # sequence :: Monad m => Asst (m a) -> m (Asst a) #
Traversable Literal
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Literal a -> f (Literal b) # sequenceA :: Applicative f => Literal (f a) -> f (Literal a) # mapM :: Monad m => (a -> m b) -> Literal a -> m (Literal b) # sequence :: Monad m => Literal (m a) -> m (Literal a) #
Traversable Sign
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Sign a -> f (Sign b) # sequenceA :: Applicative f => Sign (f a) -> f (Sign a) # mapM :: Monad m => (a -> m b) -> Sign a -> m (Sign b) # sequence :: Monad m => Sign (m a) -> m (Sign a) #
Traversable Exp
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Exp a -> f (Exp b) # sequenceA :: Applicative f => Exp (f a) -> f (Exp a) # mapM :: Monad m => (a -> m b) -> Exp a -> m (Exp b) # sequence :: Monad m => Exp (m a) -> m (Exp a) #
Traversable XName
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> XName a -> f (XName b) # sequenceA :: Applicative f => XName (f a) -> f (XName a) # mapM :: Monad m => (a -> m b) -> XName a -> m (XName b) # sequence :: Monad m => XName (m a) -> m (XName a) #
Traversable XAttr
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> XAttr a -> f (XAttr b) # sequenceA :: Applicative f => XAttr (f a) -> f (XAttr a) # mapM :: Monad m => (a -> m b) -> XAttr a -> m (XAttr b) # sequence :: Monad m => XAttr (m a) -> m (XAttr a) #
Traversable Bracket
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Bracket a -> f (Bracket b) # sequenceA :: Applicative f => Bracket (f a) -> f (Bracket a) # mapM :: Monad m => (a -> m b) -> Bracket a -> m (Bracket b) # sequence :: Monad m => Bracket (m a) -> m (Bracket a) #
Traversable Splice
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Splice a -> f (Splice b) # sequenceA :: Applicative f => Splice (f a) -> f (Splice a) # mapM :: Monad m => (a -> m b) -> Splice a -> m (Splice b) # sequence :: Monad m => Splice (m a) -> m (Splice a) #
Traversable Safety
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Safety a -> f (Safety b) # sequenceA :: Applicative f => Safety (f a) -> f (Safety a) # mapM :: Monad m => (a -> m b) -> Safety a -> m (Safety b) # sequence :: Monad m => Safety (m a) -> m (Safety a) #
Traversable CallConv
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> CallConv a -> f (CallConv b) # sequenceA :: Applicative f => CallConv (f a) -> f (CallConv a) # mapM :: Monad m => (a -> m b) -> CallConv a -> m (CallConv b) # sequence :: Monad m => CallConv (m a) -> m (CallConv a) #
Traversable ModulePragma
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> ModulePragma a -> f (ModulePragma b) # sequenceA :: Applicative f => ModulePragma (f a) -> f (ModulePragma a) # mapM :: Monad m => (a -> m b) -> ModulePragma a -> m (ModulePragma b) # sequence :: Monad m => ModulePragma (m a) -> m (ModulePragma a) #
Traversable Overlap
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Overlap a -> f (Overlap b) # sequenceA :: Applicative f => Overlap (f a) -> f (Overlap a) # mapM :: Monad m => (a -> m b) -> Overlap a -> m (Overlap b) # sequence :: Monad m => Overlap (m a) -> m (Overlap a) #
Traversable Activation
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Activation a -> f (Activation b) # sequenceA :: Applicative f => Activation (f a) -> f (Activation a) # mapM :: Monad m => (a -> m b) -> Activation a -> m (Activation b) # sequence :: Monad m => Activation (m a) -> m (Activation a) #
Traversable Rule
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Rule a -> f (Rule b) # sequenceA :: Applicative f => Rule (f a) -> f (Rule a) # mapM :: Monad m => (a -> m b) -> Rule a -> m (Rule b) # sequence :: Monad m => Rule (m a) -> m (Rule a) #
Traversable RuleVar
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> RuleVar a -> f (RuleVar b) # sequenceA :: Applicative f => RuleVar (f a) -> f (RuleVar a) # mapM :: Monad m => (a -> m b) -> RuleVar a -> m (RuleVar b) # sequence :: Monad m => RuleVar (m a) -> m (RuleVar a) #
Traversable WarningText
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> WarningText a -> f (WarningText b) # sequenceA :: Applicative f => WarningText (f a) -> f (WarningText a) # mapM :: Monad m => (a -> m b) -> WarningText a -> m (WarningText b) # sequence :: Monad m => WarningText (m a) -> m (WarningText a) #
Traversable Pat
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Pat a -> f (Pat b) # sequenceA :: Applicative f => Pat (f a) -> f (Pat a) # mapM :: Monad m => (a -> m b) -> Pat a -> m (Pat b) # sequence :: Monad m => Pat (m a) -> m (Pat a) #
Traversable PXAttr
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> PXAttr a -> f (PXAttr b) # sequenceA :: Applicative f => PXAttr (f a) -> f (PXAttr a) # mapM :: Monad m => (a -> m b) -> PXAttr a -> m (PXAttr b) # sequence :: Monad m => PXAttr (m a) -> m (PXAttr a) #
Traversable RPatOp
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> RPatOp a -> f (RPatOp b) # sequenceA :: Applicative f => RPatOp (f a) -> f (RPatOp a) # mapM :: Monad m => (a -> m b) -> RPatOp a -> m (RPatOp b) # sequence :: Monad m => RPatOp (m a) -> m (RPatOp a) #
Traversable RPat
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> RPat a -> f (RPat b) # sequenceA :: Applicative f => RPat (f a) -> f (RPat a) # mapM :: Monad m => (a -> m b) -> RPat a -> m (RPat b) # sequence :: Monad m => RPat (m a) -> m (RPat a) #
Traversable PatField
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> PatField a -> f (PatField b) # sequenceA :: Applicative f => PatField (f a) -> f (PatField a) # mapM :: Monad m => (a -> m b) -> PatField a -> m (PatField b) # sequence :: Monad m => PatField (m a) -> m (PatField a) #
Traversable Stmt
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Stmt a -> f (Stmt b) # sequenceA :: Applicative f => Stmt (f a) -> f (Stmt a) # mapM :: Monad m => (a -> m b) -> Stmt a -> m (Stmt b) # sequence :: Monad m => Stmt (m a) -> m (Stmt a) #
Traversable QualStmt
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> QualStmt a -> f (QualStmt b) # sequenceA :: Applicative f => QualStmt (f a) -> f (QualStmt a) # mapM :: Monad m => (a -> m b) -> QualStmt a -> m (QualStmt b) # sequence :: Monad m => QualStmt (m a) -> m (QualStmt a) #
Traversable FieldUpdate
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> FieldUpdate a -> f (FieldUpdate b) # sequenceA :: Applicative f => FieldUpdate (f a) -> f (FieldUpdate a) # mapM :: Monad m => (a -> m b) -> FieldUpdate a -> m (FieldUpdate b) # sequence :: Monad m => FieldUpdate (m a) -> m (FieldUpdate a) #
Traversable Alt
Instance details Defined in Language.Haskell.Exts.Syntax Methods traverse :: Applicative f => (a -> f b) -> Alt a -> f (Alt b) # sequenceA :: Applicative f => Alt (f a) -> f (Alt a) # mapM :: Monad m => (a -> m b) -> Alt a -> m (Alt b) # sequence :: Monad m => Alt (m a) -> m (Alt a) #
Traversable List
Instance details Defined in Data.Aeson.Config.Types Methods traverse :: Applicative f => (a -> f b) -> List a -> f (List b) # sequenceA :: Applicative f => List (f a) -> f (List a) # mapM :: Monad m => (a -> m b) -> List a -> m (List b) # sequence :: Monad m => List (m a) -> m (List a) #
Traversable Section
Instance details Defined in Hpack.Config Methods traverse :: Applicative f => (a -> f b) -> Section a -> f (Section b) # sequenceA :: Applicative f => Section (f a) -> f (Section a) # mapM :: Monad m => (a -> m b) -> Section a -> m (Section b) # sequence :: Monad m => Section (m a) -> m (Section a) #
Traversable Conditional
Instance details Defined in Hpack.Config Methods traverse :: Applicative f => (a -> f b) -> Conditional a -> f (Conditional b) # sequenceA :: Applicative f => Conditional (f a) -> f (Conditional a) # mapM :: Monad m => (a -> m b) -> Conditional a -> m (Conditional b) # sequence :: Monad m => Conditional (m a) -> m (Conditional a) #
Traversable HistoriedResponse
Instance details Defined in Network.HTTP.Client Methods traverse :: Applicative f => (a -> f b) -> HistoriedResponse a -> f (HistoriedResponse b) # sequenceA :: Applicative f => HistoriedResponse (f a) -> f (HistoriedResponse a) # mapM :: Monad m => (a -> m b) -> HistoriedResponse a -> m (HistoriedResponse b) # sequence :: Monad m => HistoriedResponse (m a) -> m (HistoriedResponse a) #
Traversable Response
Instance details Defined in Network.HTTP.Client.Types Methods traverse :: Applicative f => (a -> f b) -> Response a -> f (Response b) # sequenceA :: Applicative f => Response (f a) -> f (Response a) # mapM :: Monad m => (a -> m b) -> Response a -> m (Response b) # sequence :: Monad m => Response (m a) -> m (Response a) #
Traversable Vector
Instance details Defined in Data.Vector Methods traverse :: Applicative f => (a -> f b) -> Vector a -> f (Vector b) # sequenceA :: Applicative f => Vector (f a) -> f (Vector a) # mapM :: Monad m => (a -> m b) -> Vector a -> m (Vector b) # sequence :: Monad m => Vector (m a) -> m (Vector a) #
Traversable PointedList
Instance details Defined in Data.List.PointedList Methods traverse :: Applicative f => (a -> f b) -> PointedList a -> f (PointedList b) # sequenceA :: Applicative f => PointedList (f a) -> f (PointedList a) # mapM :: Monad m => (a -> m b) -> PointedList a -> m (PointedList b) # sequence :: Monad m => PointedList (m a) -> m (PointedList a) #
Traversable SmallArray
Instance details Defined in Data.Primitive.SmallArray Methods traverse :: Applicative f => (a -> f b) -> SmallArray a -> f (SmallArray b) # sequenceA :: Applicative f => SmallArray (f a) -> f (SmallArray a) # mapM :: Monad m => (a -> m b) -> SmallArray a -> m (SmallArray b) # sequence :: Monad m => SmallArray (m a) -> m (SmallArray a) #
Traversable Array
Instance details Defined in Data.Primitive.Array Methods traverse :: Applicative f => (a -> f b) -> Array a -> f (Array b) # sequenceA :: Applicative f => Array (f a) -> f (Array a) # mapM :: Monad m => (a -> m b) -> Array a -> m (Array b) # sequence :: Monad m => Array (m a) -> m (Array a) #
Traversable (Either a)	Since: base-4.7.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a0 -> f b) -> Either a a0 -> f (Either a b) # sequenceA :: Applicative f => Either a (f a0) -> f (Either a a0) # mapM :: Monad m => (a0 -> m b) -> Either a a0 -> m (Either a b) # sequence :: Monad m => Either a (m a0) -> m (Either a a0) #
Traversable (V1 :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> V1 a -> f (V1 b) # sequenceA :: Applicative f => V1 (f a) -> f (V1 a) # mapM :: Monad m => (a -> m b) -> V1 a -> m (V1 b) # sequence :: Monad m => V1 (m a) -> m (V1 a) #
Traversable (U1 :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> U1 a -> f (U1 b) # sequenceA :: Applicative f => U1 (f a) -> f (U1 a) # mapM :: Monad m => (a -> m b) -> U1 a -> m (U1 b) # sequence :: Monad m => U1 (m a) -> m (U1 a) #
Traversable ((,) a)	Since: base-4.7.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a0 -> f b) -> (a, a0) -> f (a, b) # sequenceA :: Applicative f => (a, f a0) -> f (a, a0) # mapM :: Monad m => (a0 -> m b) -> (a, a0) -> m (a, b) # sequence :: Monad m => (a, m a0) -> m (a, a0) #
Traversable (Map k)
Instance details Defined in Data.Map.Internal Methods traverse :: Applicative f => (a -> f b) -> Map k a -> f (Map k b) # sequenceA :: Applicative f => Map k (f a) -> f (Map k a) # mapM :: Monad m => (a -> m b) -> Map k a -> m (Map k b) # sequence :: Monad m => Map k (m a) -> m (Map k a) #
Traversable (HashMap k)
Instance details Defined in Data.HashMap.Base Methods traverse :: Applicative f => (a -> f b) -> HashMap k a -> f (HashMap k b) # sequenceA :: Applicative f => HashMap k (f a) -> f (HashMap k a) # mapM :: Monad m => (a -> m b) -> HashMap k a -> m (HashMap k b) # sequence :: Monad m => HashMap k (m a) -> m (HashMap k a) #
Ix i => Traversable (Array i)	Since: base-2.1
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Array i a -> f (Array i b) # sequenceA :: Applicative f => Array i (f a) -> f (Array i a) # mapM :: Monad m => (a -> m b) -> Array i a -> m (Array i b) # sequence :: Monad m => Array i (m a) -> m (Array i a) #
Traversable (Arg a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods traverse :: Applicative f => (a0 -> f b) -> Arg a a0 -> f (Arg a b) # sequenceA :: Applicative f => Arg a (f a0) -> f (Arg a a0) # mapM :: Monad m => (a0 -> m b) -> Arg a a0 -> m (Arg a b) # sequence :: Monad m => Arg a (m a0) -> m (Arg a a0) #
Traversable (Proxy :: Type -> Type)	Since: base-4.7.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Proxy a -> f (Proxy b) # sequenceA :: Applicative f => Proxy (f a) -> f (Proxy a) # mapM :: Monad m => (a -> m b) -> Proxy a -> m (Proxy b) # sequence :: Monad m => Proxy (m a) -> m (Proxy a) #
Traversable (Product a)
Instance details Defined in Data.Aeson.Config.Types Methods traverse :: Applicative f => (a0 -> f b) -> Product a a0 -> f (Product a b) # sequenceA :: Applicative f => Product a (f a0) -> f (Product a a0) # mapM :: Monad m => (a0 -> m b) -> Product a a0 -> m (Product a b) # sequence :: Monad m => Product a (m a0) -> m (Product a a0) #
Traversable f => Traversable (Rec1 f)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f0 => (a -> f0 b) -> Rec1 f a -> f0 (Rec1 f b) # sequenceA :: Applicative f0 => Rec1 f (f0 a) -> f0 (Rec1 f a) # mapM :: Monad m => (a -> m b) -> Rec1 f a -> m (Rec1 f b) # sequence :: Monad m => Rec1 f (m a) -> m (Rec1 f a) #
Traversable (URec Char :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> URec Char a -> f (URec Char b) # sequenceA :: Applicative f => URec Char (f a) -> f (URec Char a) # mapM :: Monad m => (a -> m b) -> URec Char a -> m (URec Char b) # sequence :: Monad m => URec Char (m a) -> m (URec Char a) #
Traversable (URec Double :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> URec Double a -> f (URec Double b) # sequenceA :: Applicative f => URec Double (f a) -> f (URec Double a) # mapM :: Monad m => (a -> m b) -> URec Double a -> m (URec Double b) # sequence :: Monad m => URec Double (m a) -> m (URec Double a) #
Traversable (URec Float :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> URec Float a -> f (URec Float b) # sequenceA :: Applicative f => URec Float (f a) -> f (URec Float a) # mapM :: Monad m => (a -> m b) -> URec Float a -> m (URec Float b) # sequence :: Monad m => URec Float (m a) -> m (URec Float a) #
Traversable (URec Int :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> URec Int a -> f (URec Int b) # sequenceA :: Applicative f => URec Int (f a) -> f (URec Int a) # mapM :: Monad m => (a -> m b) -> URec Int a -> m (URec Int b) # sequence :: Monad m => URec Int (m a) -> m (URec Int a) #
Traversable (URec Word :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> URec Word a -> f (URec Word b) # sequenceA :: Applicative f => URec Word (f a) -> f (URec Word a) # mapM :: Monad m => (a -> m b) -> URec Word a -> m (URec Word b) # sequence :: Monad m => URec Word (m a) -> m (URec Word a) #
Traversable (URec (Ptr ()) :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> URec (Ptr ()) a -> f (URec (Ptr ()) b) # sequenceA :: Applicative f => URec (Ptr ()) (f a) -> f (URec (Ptr ()) a) # mapM :: Monad m => (a -> m b) -> URec (Ptr ()) a -> m (URec (Ptr ()) b) # sequence :: Monad m => URec (Ptr ()) (m a) -> m (URec (Ptr ()) a) #
Traversable (Const m :: Type -> Type)	Since: base-4.7.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Const m a -> f (Const m b) # sequenceA :: Applicative f => Const m (f a) -> f (Const m a) # mapM :: Monad m0 => (a -> m0 b) -> Const m a -> m0 (Const m b) # sequence :: Monad m0 => Const m (m0 a) -> m0 (Const m a) #
Traversable f => Traversable (Ap f)	Since: base-4.12.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f0 => (a -> f0 b) -> Ap f a -> f0 (Ap f b) # sequenceA :: Applicative f0 => Ap f (f0 a) -> f0 (Ap f a) # mapM :: Monad m => (a -> m b) -> Ap f a -> m (Ap f b) # sequence :: Monad m => Ap f (m a) -> m (Ap f a) #
Traversable f => Traversable (Alt f)	Since: base-4.12.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f0 => (a -> f0 b) -> Alt f a -> f0 (Alt f b) # sequenceA :: Applicative f0 => Alt f (f0 a) -> f0 (Alt f a) # mapM :: Monad m => (a -> m b) -> Alt f a -> m (Alt f b) # sequence :: Monad m => Alt f (m a) -> m (Alt f a) #
Traversable f => Traversable (ExceptT e f)
Instance details Defined in Control.Monad.Trans.Except Methods traverse :: Applicative f0 => (a -> f0 b) -> ExceptT e f a -> f0 (ExceptT e f b) # sequenceA :: Applicative f0 => ExceptT e f (f0 a) -> f0 (ExceptT e f a) # mapM :: Monad m => (a -> m b) -> ExceptT e f a -> m (ExceptT e f b) # sequence :: Monad m => ExceptT e f (m a) -> m (ExceptT e f a) #
Traversable f => Traversable (ErrorT e f)
Instance details Defined in Control.Monad.Trans.Error Methods traverse :: Applicative f0 => (a -> f0 b) -> ErrorT e f a -> f0 (ErrorT e f b) # sequenceA :: Applicative f0 => ErrorT e f (f0 a) -> f0 (ErrorT e f a) # mapM :: Monad m => (a -> m b) -> ErrorT e f a -> m (ErrorT e f b) # sequence :: Monad m => ErrorT e f (m a) -> m (ErrorT e f a) #
Traversable (Tagged s)
Instance details Defined in Data.Tagged Methods traverse :: Applicative f => (a -> f b) -> Tagged s a -> f (Tagged s b) # sequenceA :: Applicative f => Tagged s (f a) -> f (Tagged s a) # mapM :: Monad m => (a -> m b) -> Tagged s a -> m (Tagged s b) # sequence :: Monad m => Tagged s (m a) -> m (Tagged s a) #
Traversable (K1 i c :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> K1 i c a -> f (K1 i c b) # sequenceA :: Applicative f => K1 i c (f a) -> f (K1 i c a) # mapM :: Monad m => (a -> m b) -> K1 i c a -> m (K1 i c b) # sequence :: Monad m => K1 i c (m a) -> m (K1 i c a) #
(Traversable f, Traversable g) => Traversable (f :+: g)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f0 => (a -> f0 b) -> (f :+: g) a -> f0 ((f :+: g) b) # sequenceA :: Applicative f0 => (f :+: g) (f0 a) -> f0 ((f :+: g) a) # mapM :: Monad m => (a -> m b) -> (f :+: g) a -> m ((f :+: g) b) # sequence :: Monad m => (f :+: g) (m a) -> m ((f :+: g) a) #
(Traversable f, Traversable g) => Traversable (f :*: g)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f0 => (a -> f0 b) -> (f :: g) a -> f0 ((f :: g) b) # sequenceA :: Applicative f0 => (f :: g) (f0 a) -> f0 ((f :: g) a) # mapM :: Monad m => (a -> m b) -> (f :: g) a -> m ((f :: g) b) # sequence :: Monad m => (f :: g) (m a) -> m ((f :: g) a) #
(Traversable f, Traversable g) => Traversable (Product f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Product Methods traverse :: Applicative f0 => (a -> f0 b) -> Product f g a -> f0 (Product f g b) # sequenceA :: Applicative f0 => Product f g (f0 a) -> f0 (Product f g a) # mapM :: Monad m => (a -> m b) -> Product f g a -> m (Product f g b) # sequence :: Monad m => Product f g (m a) -> m (Product f g a) #
(Traversable f, Traversable g) => Traversable (Sum f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Sum Methods traverse :: Applicative f0 => (a -> f0 b) -> Sum f g a -> f0 (Sum f g b) # sequenceA :: Applicative f0 => Sum f g (f0 a) -> f0 (Sum f g a) # mapM :: Monad m => (a -> m b) -> Sum f g a -> m (Sum f g b) # sequence :: Monad m => Sum f g (m a) -> m (Sum f g a) #
Traversable f => Traversable (M1 i c f)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f0 => (a -> f0 b) -> M1 i c f a -> f0 (M1 i c f b) # sequenceA :: Applicative f0 => M1 i c f (f0 a) -> f0 (M1 i c f a) # mapM :: Monad m => (a -> m b) -> M1 i c f a -> m (M1 i c f b) # sequence :: Monad m => M1 i c f (m a) -> m (M1 i c f a) #
(Traversable f, Traversable g) => Traversable (f :.: g)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f0 => (a -> f0 b) -> (f :.: g) a -> f0 ((f :.: g) b) # sequenceA :: Applicative f0 => (f :.: g) (f0 a) -> f0 ((f :.: g) a) # mapM :: Monad m => (a -> m b) -> (f :.: g) a -> m ((f :.: g) b) # sequence :: Monad m => (f :.: g) (m a) -> m ((f :.: g) a) #
(Traversable f, Traversable g) => Traversable (Compose f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Compose Methods traverse :: Applicative f0 => (a -> f0 b) -> Compose f g a -> f0 (Compose f g b) # sequenceA :: Applicative f0 => Compose f g (f0 a) -> f0 (Compose f g a) # mapM :: Monad m => (a -> m b) -> Compose f g a -> m (Compose f g b) # sequence :: Monad m => Compose f g (m a) -> m (Compose f g a) #
Traversable g => Traversable (Joker g a)
Instance details Defined in Data.Bifunctor.Joker Methods traverse :: Applicative f => (a0 -> f b) -> Joker g a a0 -> f (Joker g a b) # sequenceA :: Applicative f => Joker g a (f a0) -> f (Joker g a a0) # mapM :: Monad m => (a0 -> m b) -> Joker g a a0 -> m (Joker g a b) # sequence :: Monad m => Joker g a (m a0) -> m (Joker g a a0) #
Traversable (Clown f a :: Type -> Type)
Instance details Defined in Data.Bifunctor.Clown Methods traverse :: Applicative f0 => (a0 -> f0 b) -> Clown f a a0 -> f0 (Clown f a b) # sequenceA :: Applicative f0 => Clown f a (f0 a0) -> f0 (Clown f a a0) # mapM :: Monad m => (a0 -> m b) -> Clown f a a0 -> m (Clown f a b) # sequence :: Monad m => Clown f a (m a0) -> m (Clown f a a0) #
(Traversable f, Bitraversable p) => Traversable (Tannen f p a)
Instance details Defined in Data.Bifunctor.Tannen Methods traverse :: Applicative f0 => (a0 -> f0 b) -> Tannen f p a a0 -> f0 (Tannen f p a b) # sequenceA :: Applicative f0 => Tannen f p a (f0 a0) -> f0 (Tannen f p a a0) # mapM :: Monad m => (a0 -> m b) -> Tannen f p a a0 -> m (Tannen f p a b) # sequence :: Monad m => Tannen f p a (m a0) -> m (Tannen f p a a0) #
(Bitraversable p, Traversable g) => Traversable (Biff p f g a)
Instance details Defined in Data.Bifunctor.Biff Methods traverse :: Applicative f0 => (a0 -> f0 b) -> Biff p f g a a0 -> f0 (Biff p f g a b) # sequenceA :: Applicative f0 => Biff p f g a (f0 a0) -> f0 (Biff p f g a a0) # mapM :: Monad m => (a0 -> m b) -> Biff p f g a a0 -> m (Biff p f g a b) # sequence :: Monad m => Biff p f g a (m a0) -> m (Biff p f g a a0) #

class Generic a #

Representable types of kind *. This class is derivable in GHC with the DeriveGeneric flag on.

A Generic instance must satisfy the following laws:

from . to ≡ id
to . from ≡ id

Minimal complete definition

from, to

Instances

Generic Bool
Instance details Defined in GHC.Generics Associated Types type Rep Bool :: Type -> Type # Methods from :: Bool -> Rep Bool x # to :: Rep Bool x -> Bool #
Generic Ordering
Instance details Defined in GHC.Generics Associated Types type Rep Ordering :: Type -> Type # Methods from :: Ordering -> Rep Ordering x # to :: Rep Ordering x -> Ordering #
Generic Exp
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Exp :: Type -> Type # Methods from :: Exp -> Rep Exp x # to :: Rep Exp x -> Exp #
Generic Match
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Match :: Type -> Type # Methods from :: Match -> Rep Match x # to :: Rep Match x -> Match #
Generic Clause
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Clause :: Type -> Type # Methods from :: Clause -> Rep Clause x # to :: Rep Clause x -> Clause #
Generic Pat
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Pat :: Type -> Type # Methods from :: Pat -> Rep Pat x # to :: Rep Pat x -> Pat #
Generic Type
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Type :: Type -> Type # Methods from :: Type -> Rep Type x # to :: Rep Type x -> Type #
Generic Dec
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Dec :: Type -> Type # Methods from :: Dec -> Rep Dec x # to :: Rep Dec x -> Dec #
Generic Name
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Name :: Type -> Type # Methods from :: Name -> Rep Name x # to :: Rep Name x -> Name #
Generic FunDep
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep FunDep :: Type -> Type # Methods from :: FunDep -> Rep FunDep x # to :: Rep FunDep x -> FunDep #
Generic InjectivityAnn
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep InjectivityAnn :: Type -> Type # Methods from :: InjectivityAnn -> Rep InjectivityAnn x # to :: Rep InjectivityAnn x -> InjectivityAnn #
Generic Overlap
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Overlap :: Type -> Type # Methods from :: Overlap -> Rep Overlap x # to :: Rep Overlap x -> Overlap #
Generic ()
Instance details Defined in GHC.Generics Associated Types type Rep () :: Type -> Type # Methods from :: () -> Rep () x # to :: Rep () x -> () #
Generic Doc
Instance details Defined in Text.PrettyPrint.HughesPJ Associated Types type Rep Doc :: Type -> Type # Methods from :: Doc -> Rep Doc x # to :: Rep Doc x -> Doc #
Generic ShortTextLst
Instance details Defined in Distribution.ModuleName Associated Types type Rep ShortTextLst :: Type -> Type # Methods from :: ShortTextLst -> Rep ShortTextLst x # to :: Rep ShortTextLst x -> ShortTextLst #
Generic Version
Instance details Defined in Data.Version Associated Types type Rep Version :: Type -> Type # Methods from :: Version -> Rep Version x # to :: Rep Version x -> Version #
Generic LegacyExeDependency
Instance details Defined in Distribution.Types.LegacyExeDependency Associated Types type Rep LegacyExeDependency :: Type -> Type # Methods from :: LegacyExeDependency -> Rep LegacyExeDependency x # to :: Rep LegacyExeDependency x -> LegacyExeDependency #
Generic MungedPackageId
Instance details Defined in Distribution.Types.MungedPackageId Associated Types type Rep MungedPackageId :: Type -> Type # Methods from :: MungedPackageId -> Rep MungedPackageId x # to :: Rep MungedPackageId x -> MungedPackageId #
Generic MungedPackageName
Instance details Defined in Distribution.Types.MungedPackageName Associated Types type Rep MungedPackageName :: Type -> Type # Methods from :: MungedPackageName -> Rep MungedPackageName x # to :: Rep MungedPackageName x -> MungedPackageName #
Generic Dependency
Instance details Defined in Distribution.Types.Dependency Associated Types type Rep Dependency :: Type -> Type # Methods from :: Dependency -> Rep Dependency x # to :: Rep Dependency x -> Dependency #
Generic ExeDependency
Instance details Defined in Distribution.Types.ExeDependency Associated Types type Rep ExeDependency :: Type -> Type # Methods from :: ExeDependency -> Rep ExeDependency x # to :: Rep ExeDependency x -> ExeDependency #
Generic Module
Instance details Defined in Distribution.Types.Module Associated Types type Rep Module :: Type -> Type # Methods from :: Module -> Rep Module x # to :: Rep Module x -> Module #
Generic UnitId
Instance details Defined in Distribution.Types.UnitId Associated Types type Rep UnitId :: Type -> Type # Methods from :: UnitId -> Rep UnitId x # to :: Rep UnitId x -> UnitId #
Generic DefUnitId
Instance details Defined in Distribution.Types.UnitId Associated Types type Rep DefUnitId :: Type -> Type # Methods from :: DefUnitId -> Rep DefUnitId x # to :: Rep DefUnitId x -> DefUnitId #
Generic PackageIdentifier
Instance details Defined in Distribution.Types.PackageId Associated Types type Rep PackageIdentifier :: Type -> Type # Methods from :: PackageIdentifier -> Rep PackageIdentifier x # to :: Rep PackageIdentifier x -> PackageIdentifier #
Generic ComponentName
Instance details Defined in Distribution.Types.ComponentName Associated Types type Rep ComponentName :: Type -> Type # Methods from :: ComponentName -> Rep ComponentName x # to :: Rep ComponentName x -> ComponentName #
Generic UnqualComponentName
Instance details Defined in Distribution.Types.UnqualComponentName Associated Types type Rep UnqualComponentName :: Type -> Type # Methods from :: UnqualComponentName -> Rep UnqualComponentName x # to :: Rep UnqualComponentName x -> UnqualComponentName #
Generic PackageName
Instance details Defined in Distribution.Types.PackageName Associated Types type Rep PackageName :: Type -> Type # Methods from :: PackageName -> Rep PackageName x # to :: Rep PackageName x -> PackageName #
Generic CompilerFlavor
Instance details Defined in Distribution.Compiler Associated Types type Rep CompilerFlavor :: Type -> Type # Methods from :: CompilerFlavor -> Rep CompilerFlavor x # to :: Rep CompilerFlavor x -> CompilerFlavor #
Generic CompilerId
Instance details Defined in Distribution.Compiler Associated Types type Rep CompilerId :: Type -> Type # Methods from :: CompilerId -> Rep CompilerId x # to :: Rep CompilerId x -> CompilerId #
Generic CompilerInfo
Instance details Defined in Distribution.Compiler Associated Types type Rep CompilerInfo :: Type -> Type # Methods from :: CompilerInfo -> Rep CompilerInfo x # to :: Rep CompilerInfo x -> CompilerInfo #
Generic AbiTag
Instance details Defined in Distribution.Compiler Associated Types type Rep AbiTag :: Type -> Type # Methods from :: AbiTag -> Rep AbiTag x # to :: Rep AbiTag x -> AbiTag #
Generic Language
Instance details Defined in Language.Haskell.Extension Associated Types type Rep Language :: Type -> Type # Methods from :: Language -> Rep Language x # to :: Rep Language x -> Language #
Generic Extension
Instance details Defined in Language.Haskell.Extension Associated Types type Rep Extension :: Type -> Type # Methods from :: Extension -> Rep Extension x # to :: Rep Extension x -> Extension #
Generic KnownExtension
Instance details Defined in Language.Haskell.Extension Associated Types type Rep KnownExtension :: Type -> Type # Methods from :: KnownExtension -> Rep KnownExtension x # to :: Rep KnownExtension x -> KnownExtension #
Generic License
Instance details Defined in Distribution.License Associated Types type Rep License :: Type -> Type # Methods from :: License -> Rep License x # to :: Rep License x -> License #
Generic ModuleName
Instance details Defined in Distribution.ModuleName Associated Types type Rep ModuleName :: Type -> Type # Methods from :: ModuleName -> Rep ModuleName x # to :: Rep ModuleName x -> ModuleName #
Generic License
Instance details Defined in Distribution.SPDX.License Associated Types type Rep License :: Type -> Type # Methods from :: License -> Rep License x # to :: Rep License x -> License #
Generic LicenseExpression
Instance details Defined in Distribution.SPDX.LicenseExpression Associated Types type Rep LicenseExpression :: Type -> Type # Methods from :: LicenseExpression -> Rep LicenseExpression x # to :: Rep LicenseExpression x -> LicenseExpression #
Generic SimpleLicenseExpression
Instance details Defined in Distribution.SPDX.LicenseExpression Associated Types type Rep SimpleLicenseExpression :: Type -> Type # Methods from :: SimpleLicenseExpression -> Rep SimpleLicenseExpression x # to :: Rep SimpleLicenseExpression x -> SimpleLicenseExpression #
Generic LicenseExceptionId
Instance details Defined in Distribution.SPDX.LicenseExceptionId Associated Types type Rep LicenseExceptionId :: Type -> Type # Methods from :: LicenseExceptionId -> Rep LicenseExceptionId x # to :: Rep LicenseExceptionId x -> LicenseExceptionId #
Generic LicenseId
Instance details Defined in Distribution.SPDX.LicenseId Associated Types type Rep LicenseId :: Type -> Type # Methods from :: LicenseId -> Rep LicenseId x # to :: Rep LicenseId x -> LicenseId #
Generic LicenseRef
Instance details Defined in Distribution.SPDX.LicenseReference Associated Types type Rep LicenseRef :: Type -> Type # Methods from :: LicenseRef -> Rep LicenseRef x # to :: Rep LicenseRef x -> LicenseRef #
Generic AbiHash
Instance details Defined in Distribution.Types.AbiHash Associated Types type Rep AbiHash :: Type -> Type # Methods from :: AbiHash -> Rep AbiHash x # to :: Rep AbiHash x -> AbiHash #
Generic ComponentId
Instance details Defined in Distribution.Types.ComponentId Associated Types type Rep ComponentId :: Type -> Type # Methods from :: ComponentId -> Rep ComponentId x # to :: Rep ComponentId x -> ComponentId #
Generic PkgconfigName
Instance details Defined in Distribution.Types.PkgconfigName Associated Types type Rep PkgconfigName :: Type -> Type # Methods from :: PkgconfigName -> Rep PkgconfigName x # to :: Rep PkgconfigName x -> PkgconfigName #
Generic VersionRange
Instance details Defined in Distribution.Types.VersionRange Associated Types type Rep VersionRange :: Type -> Type # Methods from :: VersionRange -> Rep VersionRange x # to :: Rep VersionRange x -> VersionRange #
Generic Version
Instance details Defined in Distribution.Types.Version Associated Types type Rep Version :: Type -> Type # Methods from :: Version -> Rep Version x # to :: Rep Version x -> Version #
Generic ShortText
Instance details Defined in Distribution.Utils.ShortText Associated Types type Rep ShortText :: Type -> Type # Methods from :: ShortText -> Rep ShortText x # to :: Rep ShortText x -> ShortText #
Generic PError
Instance details Defined in Distribution.Parsec.Common Associated Types type Rep PError :: Type -> Type # Methods from :: PError -> Rep PError x # to :: Rep PError x -> PError #
Generic PWarnType
Instance details Defined in Distribution.Parsec.Common Associated Types type Rep PWarnType :: Type -> Type # Methods from :: PWarnType -> Rep PWarnType x # to :: Rep PWarnType x -> PWarnType #
Generic PWarning
Instance details Defined in Distribution.Parsec.Common Associated Types type Rep PWarning :: Type -> Type # Methods from :: PWarning -> Rep PWarning x # to :: Rep PWarning x -> PWarning #
Generic Position
Instance details Defined in Distribution.Parsec.Common Associated Types type Rep Position :: Type -> Type # Methods from :: Position -> Rep Position x # to :: Rep Position x -> Position #
Generic CabalSpecVersion
Instance details Defined in Distribution.CabalSpecVersion Associated Types type Rep CabalSpecVersion :: Type -> Type # Methods from :: CabalSpecVersion -> Rep CabalSpecVersion x # to :: Rep CabalSpecVersion x -> CabalSpecVersion #
Generic CabalFeature
Instance details Defined in Distribution.CabalSpecVersion Associated Types type Rep CabalFeature :: Type -> Type # Methods from :: CabalFeature -> Rep CabalFeature x # to :: Rep CabalFeature x -> CabalFeature #
Generic Any
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep Any :: Type -> Type # Methods from :: Any -> Rep Any x # to :: Rep Any x -> Any #
Generic All
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep All :: Type -> Type # Methods from :: All -> Rep All x # to :: Rep All x -> All #
Generic Con
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Con :: Type -> Type # Methods from :: Con -> Rep Con x # to :: Rep Con x -> Con #
Generic Value
Instance details Defined in Data.Aeson.Types.Internal Associated Types type Rep Value :: Type -> Type # Methods from :: Value -> Rep Value x # to :: Rep Value x -> Value #
Generic Void
Instance details Defined in Data.Void Associated Types type Rep Void :: Type -> Type # Methods from :: Void -> Rep Void x # to :: Rep Void x -> Void #
Generic ExitCode
Instance details Defined in GHC.IO.Exception Associated Types type Rep ExitCode :: Type -> Type # Methods from :: ExitCode -> Rep ExitCode x # to :: Rep ExitCode x -> ExitCode #
Generic Fixity
Instance details Defined in GHC.Generics Associated Types type Rep Fixity :: Type -> Type # Methods from :: Fixity -> Rep Fixity x # to :: Rep Fixity x -> Fixity #
Generic Associativity
Instance details Defined in GHC.Generics Associated Types type Rep Associativity :: Type -> Type # Methods from :: Associativity -> Rep Associativity x # to :: Rep Associativity x -> Associativity #
Generic SourceUnpackedness
Instance details Defined in GHC.Generics Associated Types type Rep SourceUnpackedness :: Type -> Type # Methods from :: SourceUnpackedness -> Rep SourceUnpackedness x # to :: Rep SourceUnpackedness x -> SourceUnpackedness #
Generic SourceStrictness
Instance details Defined in GHC.Generics Associated Types type Rep SourceStrictness :: Type -> Type # Methods from :: SourceStrictness -> Rep SourceStrictness x # to :: Rep SourceStrictness x -> SourceStrictness #
Generic DecidedStrictness
Instance details Defined in GHC.Generics Associated Types type Rep DecidedStrictness :: Type -> Type # Methods from :: DecidedStrictness -> Rep DecidedStrictness x # to :: Rep DecidedStrictness x -> DecidedStrictness #
Generic Extension
Instance details Defined in GHC.LanguageExtensions.Type Associated Types type Rep Extension :: Type -> Type # Methods from :: Extension -> Rep Extension x # to :: Rep Extension x -> Extension #
Generic ForeignSrcLang
Instance details Defined in GHC.ForeignSrcLang.Type Associated Types type Rep ForeignSrcLang :: Type -> Type # Methods from :: ForeignSrcLang -> Rep ForeignSrcLang x # to :: Rep ForeignSrcLang x -> ForeignSrcLang #
Generic Boxed
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep Boxed :: Type -> Type # Methods from :: Boxed -> Rep Boxed x # to :: Rep Boxed x -> Boxed #
Generic Tool
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep Tool :: Type -> Type # Methods from :: Tool -> Rep Tool x # to :: Rep Tool x -> Tool #
Generic SrcLoc
Instance details Defined in Language.Haskell.Exts.SrcLoc Associated Types type Rep SrcLoc :: Type -> Type # Methods from :: SrcLoc -> Rep SrcLoc x # to :: Rep SrcLoc x -> SrcLoc #
Generic SrcSpan
Instance details Defined in Language.Haskell.Exts.SrcLoc Associated Types type Rep SrcSpan :: Type -> Type # Methods from :: SrcSpan -> Rep SrcSpan x # to :: Rep SrcSpan x -> SrcSpan #
Generic SrcSpanInfo
Instance details Defined in Language.Haskell.Exts.SrcLoc Associated Types type Rep SrcSpanInfo :: Type -> Type # Methods from :: SrcSpanInfo -> Rep SrcSpanInfo x # to :: Rep SrcSpanInfo x -> SrcSpanInfo #
Generic Mode
Instance details Defined in Text.PrettyPrint.Annotated.HughesPJ Associated Types type Rep Mode :: Type -> Type # Methods from :: Mode -> Rep Mode x # to :: Rep Mode x -> Mode #
Generic Style
Instance details Defined in Text.PrettyPrint.Annotated.HughesPJ Associated Types type Rep Style :: Type -> Type # Methods from :: Style -> Rep Style x # to :: Rep Style x -> Style #
Generic Local
Instance details Defined in Hpack.Syntax.Defaults Associated Types type Rep Local :: Type -> Type # Methods from :: Local -> Rep Local x # to :: Rep Local x -> Local #
Generic BuildType
Instance details Defined in Hpack.Config Associated Types type Rep BuildType :: Type -> Type # Methods from :: BuildType -> Rep BuildType x # to :: Rep BuildType x -> BuildType #
Generic URI
Instance details Defined in Network.URI Associated Types type Rep URI :: Type -> Type # Methods from :: URI -> Rep URI x # to :: Rep URI x -> URI #
Generic TyVarBndr
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep TyVarBndr :: Type -> Type # Methods from :: TyVarBndr -> Rep TyVarBndr x # to :: Rep TyVarBndr x -> TyVarBndr #
Generic InvalidPosException
Instance details Defined in Text.Megaparsec.Pos Associated Types type Rep InvalidPosException :: Type -> Type # Methods from :: InvalidPosException -> Rep InvalidPosException x # to :: Rep InvalidPosException x -> InvalidPosException #
Generic SourcePos
Instance details Defined in Text.Megaparsec.Pos Associated Types type Rep SourcePos :: Type -> Type # Methods from :: SourcePos -> Rep SourcePos x # to :: Rep SourcePos x -> SourcePos #
Generic TextDetails
Instance details Defined in Text.PrettyPrint.Annotated.HughesPJ Associated Types type Rep TextDetails :: Type -> Type # Methods from :: TextDetails -> Rep TextDetails x # to :: Rep TextDetails x -> TextDetails #
Generic WindowBits
Instance details Defined in Codec.Compression.Zlib.Stream Associated Types type Rep WindowBits :: Type -> Type # Methods from :: WindowBits -> Rep WindowBits x # to :: Rep WindowBits x -> WindowBits #
Generic ModName
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep ModName :: Type -> Type # Methods from :: ModName -> Rep ModName x # to :: Rep ModName x -> ModName #
Generic PkgName
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep PkgName :: Type -> Type # Methods from :: PkgName -> Rep PkgName x # to :: Rep PkgName x -> PkgName #
Generic Module
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Module :: Type -> Type # Methods from :: Module -> Rep Module x # to :: Rep Module x -> Module #
Generic OccName
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep OccName :: Type -> Type # Methods from :: OccName -> Rep OccName x # to :: Rep OccName x -> OccName #
Generic NameFlavour
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep NameFlavour :: Type -> Type # Methods from :: NameFlavour -> Rep NameFlavour x # to :: Rep NameFlavour x -> NameFlavour #
Generic NameSpace
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep NameSpace :: Type -> Type # Methods from :: NameSpace -> Rep NameSpace x # to :: Rep NameSpace x -> NameSpace #
Generic Loc
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Loc :: Type -> Type # Methods from :: Loc -> Rep Loc x # to :: Rep Loc x -> Loc #
Generic Info
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Info :: Type -> Type # Methods from :: Info -> Rep Info x # to :: Rep Info x -> Info #
Generic ModuleInfo
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep ModuleInfo :: Type -> Type # Methods from :: ModuleInfo -> Rep ModuleInfo x # to :: Rep ModuleInfo x -> ModuleInfo #
Generic Fixity
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Fixity :: Type -> Type # Methods from :: Fixity -> Rep Fixity x # to :: Rep Fixity x -> Fixity #
Generic FixityDirection
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep FixityDirection :: Type -> Type # Methods from :: FixityDirection -> Rep FixityDirection x # to :: Rep FixityDirection x -> FixityDirection #
Generic Lit
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Lit :: Type -> Type # Methods from :: Lit -> Rep Lit x # to :: Rep Lit x -> Lit #
Generic Body
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Body :: Type -> Type # Methods from :: Body -> Rep Body x # to :: Rep Body x -> Body #
Generic Guard
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Guard :: Type -> Type # Methods from :: Guard -> Rep Guard x # to :: Rep Guard x -> Guard #
Generic Stmt
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Stmt :: Type -> Type # Methods from :: Stmt -> Rep Stmt x # to :: Rep Stmt x -> Stmt #
Generic Range
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Range :: Type -> Type # Methods from :: Range -> Rep Range x # to :: Rep Range x -> Range #
Generic DerivClause
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep DerivClause :: Type -> Type # Methods from :: DerivClause -> Rep DerivClause x # to :: Rep DerivClause x -> DerivClause #
Generic DerivStrategy
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep DerivStrategy :: Type -> Type # Methods from :: DerivStrategy -> Rep DerivStrategy x # to :: Rep DerivStrategy x -> DerivStrategy #
Generic TypeFamilyHead
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep TypeFamilyHead :: Type -> Type # Methods from :: TypeFamilyHead -> Rep TypeFamilyHead x # to :: Rep TypeFamilyHead x -> TypeFamilyHead #
Generic TySynEqn
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep TySynEqn :: Type -> Type # Methods from :: TySynEqn -> Rep TySynEqn x # to :: Rep TySynEqn x -> TySynEqn #
Generic Foreign
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Foreign :: Type -> Type # Methods from :: Foreign -> Rep Foreign x # to :: Rep Foreign x -> Foreign #
Generic Callconv
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Callconv :: Type -> Type # Methods from :: Callconv -> Rep Callconv x # to :: Rep Callconv x -> Callconv #
Generic Safety
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Safety :: Type -> Type # Methods from :: Safety -> Rep Safety x # to :: Rep Safety x -> Safety #
Generic Pragma
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Pragma :: Type -> Type # Methods from :: Pragma -> Rep Pragma x # to :: Rep Pragma x -> Pragma #
Generic Inline
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Inline :: Type -> Type # Methods from :: Inline -> Rep Inline x # to :: Rep Inline x -> Inline #
Generic RuleMatch
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep RuleMatch :: Type -> Type # Methods from :: RuleMatch -> Rep RuleMatch x # to :: Rep RuleMatch x -> RuleMatch #
Generic Phases
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Phases :: Type -> Type # Methods from :: Phases -> Rep Phases x # to :: Rep Phases x -> Phases #
Generic RuleBndr
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep RuleBndr :: Type -> Type # Methods from :: RuleBndr -> Rep RuleBndr x # to :: Rep RuleBndr x -> RuleBndr #
Generic AnnTarget
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep AnnTarget :: Type -> Type # Methods from :: AnnTarget -> Rep AnnTarget x # to :: Rep AnnTarget x -> AnnTarget #
Generic SourceUnpackedness
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep SourceUnpackedness :: Type -> Type # Methods from :: SourceUnpackedness -> Rep SourceUnpackedness x # to :: Rep SourceUnpackedness x -> SourceUnpackedness #
Generic SourceStrictness
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep SourceStrictness :: Type -> Type # Methods from :: SourceStrictness -> Rep SourceStrictness x # to :: Rep SourceStrictness x -> SourceStrictness #
Generic DecidedStrictness
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep DecidedStrictness :: Type -> Type # Methods from :: DecidedStrictness -> Rep DecidedStrictness x # to :: Rep DecidedStrictness x -> DecidedStrictness #
Generic Bang
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Bang :: Type -> Type # Methods from :: Bang -> Rep Bang x # to :: Rep Bang x -> Bang #
Generic PatSynDir
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep PatSynDir :: Type -> Type # Methods from :: PatSynDir -> Rep PatSynDir x # to :: Rep PatSynDir x -> PatSynDir #
Generic PatSynArgs
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep PatSynArgs :: Type -> Type # Methods from :: PatSynArgs -> Rep PatSynArgs x # to :: Rep PatSynArgs x -> PatSynArgs #
Generic FamilyResultSig
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep FamilyResultSig :: Type -> Type # Methods from :: FamilyResultSig -> Rep FamilyResultSig x # to :: Rep FamilyResultSig x -> FamilyResultSig #
Generic TyLit
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep TyLit :: Type -> Type # Methods from :: TyLit -> Rep TyLit x # to :: Rep TyLit x -> TyLit #
Generic Role
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep Role :: Type -> Type # Methods from :: Role -> Rep Role x # to :: Rep Role x -> Role #
Generic AnnLookup
Instance details Defined in Language.Haskell.TH.Syntax Associated Types type Rep AnnLookup :: Type -> Type # Methods from :: AnnLookup -> Rep AnnLookup x # to :: Rep AnnLookup x -> AnnLookup #
Generic Format
Instance details Defined in Codec.Compression.Zlib.Stream Associated Types type Rep Format :: Type -> Type # Methods from :: Format -> Rep Format x # to :: Rep Format x -> Format #
Generic Method
Instance details Defined in Codec.Compression.Zlib.Stream Associated Types type Rep Method :: Type -> Type # Methods from :: Method -> Rep Method x # to :: Rep Method x -> Method #
Generic CompressionLevel
Instance details Defined in Codec.Compression.Zlib.Stream Associated Types type Rep CompressionLevel :: Type -> Type # Methods from :: CompressionLevel -> Rep CompressionLevel x # to :: Rep CompressionLevel x -> CompressionLevel #
Generic MemoryLevel
Instance details Defined in Codec.Compression.Zlib.Stream Associated Types type Rep MemoryLevel :: Type -> Type # Methods from :: MemoryLevel -> Rep MemoryLevel x # to :: Rep MemoryLevel x -> MemoryLevel #
Generic CompressionStrategy
Instance details Defined in Codec.Compression.Zlib.Stream Associated Types type Rep CompressionStrategy :: Type -> Type # Methods from :: CompressionStrategy -> Rep CompressionStrategy x # to :: Rep CompressionStrategy x -> CompressionStrategy #
Generic ChallengeError Source #
Instance details Defined in AOC2018.Types Associated Types type Rep ChallengeError :: Type -> Type # Methods from :: ChallengeError -> Rep ChallengeError x # to :: Rep ChallengeError x -> ChallengeError #
Generic Condition
Instance details Defined in Hpack.Config Associated Types type Rep Condition :: Type -> Type # Methods from :: Condition -> Rep Condition x # to :: Rep Condition x -> Condition #
Generic CustomSetupSection
Instance details Defined in Hpack.Config Associated Types type Rep CustomSetupSection :: Type -> Type # Methods from :: CustomSetupSection -> Rep CustomSetupSection x # to :: Rep CustomSetupSection x -> CustomSetupSection #
Generic ExecutableSection
Instance details Defined in Hpack.Config Associated Types type Rep ExecutableSection :: Type -> Type # Methods from :: ExecutableSection -> Rep ExecutableSection x # to :: Rep ExecutableSection x -> ExecutableSection #
Generic FlagSection
Instance details Defined in Hpack.Config Associated Types type Rep FlagSection :: Type -> Type # Methods from :: FlagSection -> Rep FlagSection x # to :: Rep FlagSection x -> FlagSection #
Generic LibrarySection
Instance details Defined in Hpack.Config Associated Types type Rep LibrarySection :: Type -> Type # Methods from :: LibrarySection -> Rep LibrarySection x # to :: Rep LibrarySection x -> LibrarySection #
Generic DefaultsConfig
Instance details Defined in Hpack.Config Associated Types type Rep DefaultsConfig :: Type -> Type # Methods from :: DefaultsConfig -> Rep DefaultsConfig x # to :: Rep DefaultsConfig x -> DefaultsConfig #
Generic ParseGithub
Instance details Defined in Hpack.Syntax.Defaults Associated Types type Rep ParseGithub :: Type -> Type # Methods from :: ParseGithub -> Rep ParseGithub x # to :: Rep ParseGithub x -> ParseGithub #
Generic Config Source #
Instance details Defined in AOC2018 Associated Types type Rep Config :: Type -> Type # Methods from :: Config -> Rep Config x # to :: Rep Config x -> Config #
Generic [a]
Instance details Defined in GHC.Generics Associated Types type Rep [a] :: Type -> Type # Methods from :: [a] -> Rep [a] x # to :: Rep [a] x -> [a] #
Generic (Maybe a)
Instance details Defined in GHC.Generics Associated Types type Rep (Maybe a) :: Type -> Type # Methods from :: Maybe a -> Rep (Maybe a) x # to :: Rep (Maybe a) x -> Maybe a #
Generic (Par1 p)
Instance details Defined in GHC.Generics Associated Types type Rep (Par1 p) :: Type -> Type # Methods from :: Par1 p -> Rep (Par1 p) x # to :: Rep (Par1 p) x -> Par1 p #
Generic (Last a)
Instance details Defined in Data.Semigroup Associated Types type Rep (Last a) :: Type -> Type # Methods from :: Last a -> Rep (Last a) x # to :: Rep (Last a) x -> Last a #
Generic (VersionRangeF a)
Instance details Defined in Distribution.Types.VersionRange Associated Types type Rep (VersionRangeF a) :: Type -> Type # Methods from :: VersionRangeF a -> Rep (VersionRangeF a) x # to :: Rep (VersionRangeF a) x -> VersionRangeF a #
Generic (Last' a)
Instance details Defined in Distribution.Compat.Semigroup Associated Types type Rep (Last' a) :: Type -> Type # Methods from :: Last' a -> Rep (Last' a) x # to :: Rep (Last' a) x -> Last' a #
Generic (SCC vertex)
Instance details Defined in Data.Graph Associated Types type Rep (SCC vertex) :: Type -> Type # Methods from :: SCC vertex -> Rep (SCC vertex) x # to :: Rep (SCC vertex) x -> SCC vertex #
Generic (Identity a)
Instance details Defined in Data.Functor.Identity Associated Types type Rep (Identity a) :: Type -> Type # Methods from :: Identity a -> Rep (Identity a) x # to :: Rep (Identity a) x -> Identity a #
Generic (ZipList a)
Instance details Defined in Control.Applicative Associated Types type Rep (ZipList a) :: Type -> Type # Methods from :: ZipList a -> Rep (ZipList a) x # to :: Rep (ZipList a) x -> ZipList a #
Generic (Complex a)
Instance details Defined in Data.Complex Associated Types type Rep (Complex a) :: Type -> Type # Methods from :: Complex a -> Rep (Complex a) x # to :: Rep (Complex a) x -> Complex a #
Generic (Min a)
Instance details Defined in Data.Semigroup Associated Types type Rep (Min a) :: Type -> Type # Methods from :: Min a -> Rep (Min a) x # to :: Rep (Min a) x -> Min a #
Generic (Max a)
Instance details Defined in Data.Semigroup Associated Types type Rep (Max a) :: Type -> Type # Methods from :: Max a -> Rep (Max a) x # to :: Rep (Max a) x -> Max a #
Generic (First a)
Instance details Defined in Data.Semigroup Associated Types type Rep (First a) :: Type -> Type # Methods from :: First a -> Rep (First a) x # to :: Rep (First a) x -> First a #
Generic (WrappedMonoid m)
Instance details Defined in Data.Semigroup Associated Types type Rep (WrappedMonoid m) :: Type -> Type # Methods from :: WrappedMonoid m -> Rep (WrappedMonoid m) x # to :: Rep (WrappedMonoid m) x -> WrappedMonoid m #
Generic (Option a)
Instance details Defined in Data.Semigroup Associated Types type Rep (Option a) :: Type -> Type # Methods from :: Option a -> Rep (Option a) x # to :: Rep (Option a) x -> Option a #
Generic (First a)
Instance details Defined in Data.Monoid Associated Types type Rep (First a) :: Type -> Type # Methods from :: First a -> Rep (First a) x # to :: Rep (First a) x -> First a #
Generic (Last a)
Instance details Defined in Data.Monoid Associated Types type Rep (Last a) :: Type -> Type # Methods from :: Last a -> Rep (Last a) x # to :: Rep (Last a) x -> Last a #
Generic (Dual a)
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep (Dual a) :: Type -> Type # Methods from :: Dual a -> Rep (Dual a) x # to :: Rep (Dual a) x -> Dual a #
Generic (Endo a)
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep (Endo a) :: Type -> Type # Methods from :: Endo a -> Rep (Endo a) x # to :: Rep (Endo a) x -> Endo a #
Generic (Sum a)
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep (Sum a) :: Type -> Type # Methods from :: Sum a -> Rep (Sum a) x # to :: Rep (Sum a) x -> Sum a #
Generic (Product a)
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep (Product a) :: Type -> Type # Methods from :: Product a -> Rep (Product a) x # to :: Rep (Product a) x -> Product a #
Generic (Down a)
Instance details Defined in GHC.Generics Associated Types type Rep (Down a) :: Type -> Type # Methods from :: Down a -> Rep (Down a) x # to :: Rep (Down a) x -> Down a #
Generic (NonEmpty a)
Instance details Defined in GHC.Generics Associated Types type Rep (NonEmpty a) :: Type -> Type # Methods from :: NonEmpty a -> Rep (NonEmpty a) x # to :: Rep (NonEmpty a) x -> NonEmpty a #
Generic (Tree a)
Instance details Defined in Data.Tree Associated Types type Rep (Tree a) :: Type -> Type # Methods from :: Tree a -> Rep (Tree a) x # to :: Rep (Tree a) x -> Tree a #
Generic (FingerTree a)
Instance details Defined in Data.Sequence.Internal Associated Types type Rep (FingerTree a) :: Type -> Type # Methods from :: FingerTree a -> Rep (FingerTree a) x # to :: Rep (FingerTree a) x -> FingerTree a #
Generic (Digit a)
Instance details Defined in Data.Sequence.Internal Associated Types type Rep (Digit a) :: Type -> Type # Methods from :: Digit a -> Rep (Digit a) x # to :: Rep (Digit a) x -> Digit a #
Generic (Node a)
Instance details Defined in Data.Sequence.Internal Associated Types type Rep (Node a) :: Type -> Type # Methods from :: Node a -> Rep (Node a) x # to :: Rep (Node a) x -> Node a #
Generic (Elem a)
Instance details Defined in Data.Sequence.Internal Associated Types type Rep (Elem a) :: Type -> Type # Methods from :: Elem a -> Rep (Elem a) x # to :: Rep (Elem a) x -> Elem a #
Generic (ViewL a)
Instance details Defined in Data.Sequence.Internal Associated Types type Rep (ViewL a) :: Type -> Type # Methods from :: ViewL a -> Rep (ViewL a) x # to :: Rep (ViewL a) x -> ViewL a #
Generic (ViewR a)
Instance details Defined in Data.Sequence.Internal Associated Types type Rep (ViewR a) :: Type -> Type # Methods from :: ViewR a -> Rep (ViewR a) x # to :: Rep (ViewR a) x -> ViewR a #
Generic (Finite n)
Instance details Defined in Data.Finite.Internal Associated Types type Rep (Finite n) :: Type -> Type # Methods from :: Finite n -> Rep (Finite n) x # to :: Rep (Finite n) x -> Finite n #
Generic (Name l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Name l) :: Type -> Type # Methods from :: Name l -> Rep (Name l) x # to :: Rep (Name l) x -> Name l #
Generic (ModuleName l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (ModuleName l) :: Type -> Type # Methods from :: ModuleName l -> Rep (ModuleName l) x # to :: Rep (ModuleName l) x -> ModuleName l #
Generic (SpecialCon l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (SpecialCon l) :: Type -> Type # Methods from :: SpecialCon l -> Rep (SpecialCon l) x # to :: Rep (SpecialCon l) x -> SpecialCon l #
Generic (QName l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (QName l) :: Type -> Type # Methods from :: QName l -> Rep (QName l) x # to :: Rep (QName l) x -> QName l #
Generic (IPName l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (IPName l) :: Type -> Type # Methods from :: IPName l -> Rep (IPName l) x # to :: Rep (IPName l) x -> IPName l #
Generic (QOp l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (QOp l) :: Type -> Type # Methods from :: QOp l -> Rep (QOp l) x # to :: Rep (QOp l) x -> QOp l #
Generic (Op l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Op l) :: Type -> Type # Methods from :: Op l -> Rep (Op l) x # to :: Rep (Op l) x -> Op l #
Generic (CName l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (CName l) :: Type -> Type # Methods from :: CName l -> Rep (CName l) x # to :: Rep (CName l) x -> CName l #
Generic (Module l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Module l) :: Type -> Type # Methods from :: Module l -> Rep (Module l) x # to :: Rep (Module l) x -> Module l #
Generic (ModuleHead l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (ModuleHead l) :: Type -> Type # Methods from :: ModuleHead l -> Rep (ModuleHead l) x # to :: Rep (ModuleHead l) x -> ModuleHead l #
Generic (ExportSpecList l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (ExportSpecList l) :: Type -> Type # Methods from :: ExportSpecList l -> Rep (ExportSpecList l) x # to :: Rep (ExportSpecList l) x -> ExportSpecList l #
Generic (ExportSpec l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (ExportSpec l) :: Type -> Type # Methods from :: ExportSpec l -> Rep (ExportSpec l) x # to :: Rep (ExportSpec l) x -> ExportSpec l #
Generic (EWildcard l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (EWildcard l) :: Type -> Type # Methods from :: EWildcard l -> Rep (EWildcard l) x # to :: Rep (EWildcard l) x -> EWildcard l #
Generic (Namespace l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Namespace l) :: Type -> Type # Methods from :: Namespace l -> Rep (Namespace l) x # to :: Rep (Namespace l) x -> Namespace l #
Generic (ImportDecl l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (ImportDecl l) :: Type -> Type # Methods from :: ImportDecl l -> Rep (ImportDecl l) x # to :: Rep (ImportDecl l) x -> ImportDecl l #
Generic (ImportSpecList l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (ImportSpecList l) :: Type -> Type # Methods from :: ImportSpecList l -> Rep (ImportSpecList l) x # to :: Rep (ImportSpecList l) x -> ImportSpecList l #
Generic (ImportSpec l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (ImportSpec l) :: Type -> Type # Methods from :: ImportSpec l -> Rep (ImportSpec l) x # to :: Rep (ImportSpec l) x -> ImportSpec l #
Generic (Assoc l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Assoc l) :: Type -> Type # Methods from :: Assoc l -> Rep (Assoc l) x # to :: Rep (Assoc l) x -> Assoc l #
Generic (Decl l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Decl l) :: Type -> Type # Methods from :: Decl l -> Rep (Decl l) x # to :: Rep (Decl l) x -> Decl l #
Generic (PatternSynDirection l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (PatternSynDirection l) :: Type -> Type # Methods from :: PatternSynDirection l -> Rep (PatternSynDirection l) x # to :: Rep (PatternSynDirection l) x -> PatternSynDirection l #
Generic (TypeEqn l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (TypeEqn l) :: Type -> Type # Methods from :: TypeEqn l -> Rep (TypeEqn l) x # to :: Rep (TypeEqn l) x -> TypeEqn l #
Generic (Annotation l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Annotation l) :: Type -> Type # Methods from :: Annotation l -> Rep (Annotation l) x # to :: Rep (Annotation l) x -> Annotation l #
Generic (BooleanFormula l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (BooleanFormula l) :: Type -> Type # Methods from :: BooleanFormula l -> Rep (BooleanFormula l) x # to :: Rep (BooleanFormula l) x -> BooleanFormula l #
Generic (Role l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Role l) :: Type -> Type # Methods from :: Role l -> Rep (Role l) x # to :: Rep (Role l) x -> Role l #
Generic (DataOrNew l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (DataOrNew l) :: Type -> Type # Methods from :: DataOrNew l -> Rep (DataOrNew l) x # to :: Rep (DataOrNew l) x -> DataOrNew l #
Generic (InjectivityInfo l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (InjectivityInfo l) :: Type -> Type # Methods from :: InjectivityInfo l -> Rep (InjectivityInfo l) x # to :: Rep (InjectivityInfo l) x -> InjectivityInfo l #
Generic (ResultSig l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (ResultSig l) :: Type -> Type # Methods from :: ResultSig l -> Rep (ResultSig l) x # to :: Rep (ResultSig l) x -> ResultSig l #
Generic (DeclHead l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (DeclHead l) :: Type -> Type # Methods from :: DeclHead l -> Rep (DeclHead l) x # to :: Rep (DeclHead l) x -> DeclHead l #
Generic (InstRule l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (InstRule l) :: Type -> Type # Methods from :: InstRule l -> Rep (InstRule l) x # to :: Rep (InstRule l) x -> InstRule l #
Generic (InstHead l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (InstHead l) :: Type -> Type # Methods from :: InstHead l -> Rep (InstHead l) x # to :: Rep (InstHead l) x -> InstHead l #
Generic (Deriving l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Deriving l) :: Type -> Type # Methods from :: Deriving l -> Rep (Deriving l) x # to :: Rep (Deriving l) x -> Deriving l #
Generic (DerivStrategy l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (DerivStrategy l) :: Type -> Type # Methods from :: DerivStrategy l -> Rep (DerivStrategy l) x # to :: Rep (DerivStrategy l) x -> DerivStrategy l #
Generic (Binds l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Binds l) :: Type -> Type # Methods from :: Binds l -> Rep (Binds l) x # to :: Rep (Binds l) x -> Binds l #
Generic (IPBind l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (IPBind l) :: Type -> Type # Methods from :: IPBind l -> Rep (IPBind l) x # to :: Rep (IPBind l) x -> IPBind l #
Generic (Match l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Match l) :: Type -> Type # Methods from :: Match l -> Rep (Match l) x # to :: Rep (Match l) x -> Match l #
Generic (QualConDecl l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (QualConDecl l) :: Type -> Type # Methods from :: QualConDecl l -> Rep (QualConDecl l) x # to :: Rep (QualConDecl l) x -> QualConDecl l #
Generic (ConDecl l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (ConDecl l) :: Type -> Type # Methods from :: ConDecl l -> Rep (ConDecl l) x # to :: Rep (ConDecl l) x -> ConDecl l #
Generic (FieldDecl l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (FieldDecl l) :: Type -> Type # Methods from :: FieldDecl l -> Rep (FieldDecl l) x # to :: Rep (FieldDecl l) x -> FieldDecl l #
Generic (GadtDecl l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (GadtDecl l) :: Type -> Type # Methods from :: GadtDecl l -> Rep (GadtDecl l) x # to :: Rep (GadtDecl l) x -> GadtDecl l #
Generic (ClassDecl l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (ClassDecl l) :: Type -> Type # Methods from :: ClassDecl l -> Rep (ClassDecl l) x # to :: Rep (ClassDecl l) x -> ClassDecl l #
Generic (InstDecl l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (InstDecl l) :: Type -> Type # Methods from :: InstDecl l -> Rep (InstDecl l) x # to :: Rep (InstDecl l) x -> InstDecl l #
Generic (BangType l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (BangType l) :: Type -> Type # Methods from :: BangType l -> Rep (BangType l) x # to :: Rep (BangType l) x -> BangType l #
Generic (Unpackedness l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Unpackedness l) :: Type -> Type # Methods from :: Unpackedness l -> Rep (Unpackedness l) x # to :: Rep (Unpackedness l) x -> Unpackedness l #
Generic (Rhs l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Rhs l) :: Type -> Type # Methods from :: Rhs l -> Rep (Rhs l) x # to :: Rep (Rhs l) x -> Rhs l #
Generic (GuardedRhs l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (GuardedRhs l) :: Type -> Type # Methods from :: GuardedRhs l -> Rep (GuardedRhs l) x # to :: Rep (GuardedRhs l) x -> GuardedRhs l #
Generic (Type l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Type l) :: Type -> Type # Methods from :: Type l -> Rep (Type l) x # to :: Rep (Type l) x -> Type l #
Generic (MaybePromotedName l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (MaybePromotedName l) :: Type -> Type # Methods from :: MaybePromotedName l -> Rep (MaybePromotedName l) x # to :: Rep (MaybePromotedName l) x -> MaybePromotedName l #
Generic (Promoted l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Promoted l) :: Type -> Type # Methods from :: Promoted l -> Rep (Promoted l) x # to :: Rep (Promoted l) x -> Promoted l #
Generic (TyVarBind l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (TyVarBind l) :: Type -> Type # Methods from :: TyVarBind l -> Rep (TyVarBind l) x # to :: Rep (TyVarBind l) x -> TyVarBind l #
Generic (Kind l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Kind l) :: Type -> Type # Methods from :: Kind l -> Rep (Kind l) x # to :: Rep (Kind l) x -> Kind l #
Generic (FunDep l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (FunDep l) :: Type -> Type # Methods from :: FunDep l -> Rep (FunDep l) x # to :: Rep (FunDep l) x -> FunDep l #
Generic (Context l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Context l) :: Type -> Type # Methods from :: Context l -> Rep (Context l) x # to :: Rep (Context l) x -> Context l #
Generic (Asst l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Asst l) :: Type -> Type # Methods from :: Asst l -> Rep (Asst l) x # to :: Rep (Asst l) x -> Asst l #
Generic (Literal l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Literal l) :: Type -> Type # Methods from :: Literal l -> Rep (Literal l) x # to :: Rep (Literal l) x -> Literal l #
Generic (Sign l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Sign l) :: Type -> Type # Methods from :: Sign l -> Rep (Sign l) x # to :: Rep (Sign l) x -> Sign l #
Generic (Exp l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Exp l) :: Type -> Type # Methods from :: Exp l -> Rep (Exp l) x # to :: Rep (Exp l) x -> Exp l #
Generic (XName l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (XName l) :: Type -> Type # Methods from :: XName l -> Rep (XName l) x # to :: Rep (XName l) x -> XName l #
Generic (XAttr l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (XAttr l) :: Type -> Type # Methods from :: XAttr l -> Rep (XAttr l) x # to :: Rep (XAttr l) x -> XAttr l #
Generic (Bracket l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Bracket l) :: Type -> Type # Methods from :: Bracket l -> Rep (Bracket l) x # to :: Rep (Bracket l) x -> Bracket l #
Generic (Splice l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Splice l) :: Type -> Type # Methods from :: Splice l -> Rep (Splice l) x # to :: Rep (Splice l) x -> Splice l #
Generic (Safety l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Safety l) :: Type -> Type # Methods from :: Safety l -> Rep (Safety l) x # to :: Rep (Safety l) x -> Safety l #
Generic (CallConv l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (CallConv l) :: Type -> Type # Methods from :: CallConv l -> Rep (CallConv l) x # to :: Rep (CallConv l) x -> CallConv l #
Generic (ModulePragma l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (ModulePragma l) :: Type -> Type # Methods from :: ModulePragma l -> Rep (ModulePragma l) x # to :: Rep (ModulePragma l) x -> ModulePragma l #
Generic (Overlap l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Overlap l) :: Type -> Type # Methods from :: Overlap l -> Rep (Overlap l) x # to :: Rep (Overlap l) x -> Overlap l #
Generic (Activation l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Activation l) :: Type -> Type # Methods from :: Activation l -> Rep (Activation l) x # to :: Rep (Activation l) x -> Activation l #
Generic (Rule l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Rule l) :: Type -> Type # Methods from :: Rule l -> Rep (Rule l) x # to :: Rep (Rule l) x -> Rule l #
Generic (RuleVar l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (RuleVar l) :: Type -> Type # Methods from :: RuleVar l -> Rep (RuleVar l) x # to :: Rep (RuleVar l) x -> RuleVar l #
Generic (WarningText l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (WarningText l) :: Type -> Type # Methods from :: WarningText l -> Rep (WarningText l) x # to :: Rep (WarningText l) x -> WarningText l #
Generic (Pat l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Pat l) :: Type -> Type # Methods from :: Pat l -> Rep (Pat l) x # to :: Rep (Pat l) x -> Pat l #
Generic (PXAttr l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (PXAttr l) :: Type -> Type # Methods from :: PXAttr l -> Rep (PXAttr l) x # to :: Rep (PXAttr l) x -> PXAttr l #
Generic (RPatOp l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (RPatOp l) :: Type -> Type # Methods from :: RPatOp l -> Rep (RPatOp l) x # to :: Rep (RPatOp l) x -> RPatOp l #
Generic (RPat l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (RPat l) :: Type -> Type # Methods from :: RPat l -> Rep (RPat l) x # to :: Rep (RPat l) x -> RPat l #
Generic (PatField l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (PatField l) :: Type -> Type # Methods from :: PatField l -> Rep (PatField l) x # to :: Rep (PatField l) x -> PatField l #
Generic (Stmt l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Stmt l) :: Type -> Type # Methods from :: Stmt l -> Rep (Stmt l) x # to :: Rep (Stmt l) x -> Stmt l #
Generic (QualStmt l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (QualStmt l) :: Type -> Type # Methods from :: QualStmt l -> Rep (QualStmt l) x # to :: Rep (QualStmt l) x -> QualStmt l #
Generic (FieldUpdate l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (FieldUpdate l) :: Type -> Type # Methods from :: FieldUpdate l -> Rep (FieldUpdate l) x # to :: Rep (FieldUpdate l) x -> FieldUpdate l #
Generic (Alt l)
Instance details Defined in Language.Haskell.Exts.Syntax Associated Types type Rep (Alt l) :: Type -> Type # Methods from :: Alt l -> Rep (Alt l) x # to :: Rep (Alt l) x -> Alt l #
Generic (Loc a)
Instance details Defined in Language.Haskell.Exts.SrcLoc Associated Types type Rep (Loc a) :: Type -> Type # Methods from :: Loc a -> Rep (Loc a) x # to :: Rep (Loc a) x -> Loc a #
Generic (HistoriedResponse body)
Instance details Defined in Network.HTTP.Client Associated Types type Rep (HistoriedResponse body) :: Type -> Type # Methods from :: HistoriedResponse body -> Rep (HistoriedResponse body) x # to :: Rep (HistoriedResponse body) x -> HistoriedResponse body #
Generic (ErrorItem t)
Instance details Defined in Text.Megaparsec.Error Associated Types type Rep (ErrorItem t) :: Type -> Type # Methods from :: ErrorItem t -> Rep (ErrorItem t) x # to :: Rep (ErrorItem t) x -> ErrorItem t #
Generic (ErrorFancy e)
Instance details Defined in Text.Megaparsec.Error Associated Types type Rep (ErrorFancy e) :: Type -> Type # Methods from :: ErrorFancy e -> Rep (ErrorFancy e) x # to :: Rep (ErrorFancy e) x -> ErrorFancy e #
Generic (State s)
Instance details Defined in Text.Megaparsec.State Associated Types type Rep (State s) :: Type -> Type # Methods from :: State s -> Rep (State s) x # to :: Rep (State s) x -> State s #
Generic (PosState s)
Instance details Defined in Text.Megaparsec.State Associated Types type Rep (PosState s) :: Type -> Type # Methods from :: PosState s -> Rep (PosState s) x # to :: Rep (PosState s) x -> PosState s #
Generic (Doc a)
Instance details Defined in Text.PrettyPrint.Annotated.HughesPJ Associated Types type Rep (Doc a) :: Type -> Type # Methods from :: Doc a -> Rep (Doc a) x # to :: Rep (Doc a) x -> Doc a #
Generic (Either a b)
Instance details Defined in GHC.Generics Associated Types type Rep (Either a b) :: Type -> Type # Methods from :: Either a b -> Rep (Either a b) x # to :: Rep (Either a b) x -> Either a b #
Generic (V1 p)
Instance details Defined in GHC.Generics Associated Types type Rep (V1 p) :: Type -> Type # Methods from :: V1 p -> Rep (V1 p) x # to :: Rep (V1 p) x -> V1 p #
Generic (U1 p)
Instance details Defined in GHC.Generics Associated Types type Rep (U1 p) :: Type -> Type # Methods from :: U1 p -> Rep (U1 p) x # to :: Rep (U1 p) x -> U1 p #
Generic (a, b)
Instance details Defined in GHC.Generics Associated Types type Rep (a, b) :: Type -> Type # Methods from :: (a, b) -> Rep (a, b) x # to :: Rep (a, b) x -> (a, b) #
Generic (WrappedMonad m a)
Instance details Defined in Control.Applicative Associated Types type Rep (WrappedMonad m a) :: Type -> Type # Methods from :: WrappedMonad m a -> Rep (WrappedMonad m a) x # to :: Rep (WrappedMonad m a) x -> WrappedMonad m a #
Generic (Arg a b)
Instance details Defined in Data.Semigroup Associated Types type Rep (Arg a b) :: Type -> Type # Methods from :: Arg a b -> Rep (Arg a b) x # to :: Rep (Arg a b) x -> Arg a b #
Generic (Proxy t)
Instance details Defined in GHC.Generics Associated Types type Rep (Proxy t) :: Type -> Type # Methods from :: Proxy t -> Rep (Proxy t) x # to :: Rep (Proxy t) x -> Proxy t #
Generic (ParseError s e)
Instance details Defined in Text.Megaparsec.Error Associated Types type Rep (ParseError s e) :: Type -> Type # Methods from :: ParseError s e -> Rep (ParseError s e) x # to :: Rep (ParseError s e) x -> ParseError s e #
Generic (ParseErrorBundle s e)
Instance details Defined in Text.Megaparsec.Error Associated Types type Rep (ParseErrorBundle s e) :: Type -> Type # Methods from :: ParseErrorBundle s e -> Rep (ParseErrorBundle s e) x # to :: Rep (ParseErrorBundle s e) x -> ParseErrorBundle s e #
Generic (PackageConfig_ library executable)
Instance details Defined in Hpack.Config Associated Types type Rep (PackageConfig_ library executable) :: Type -> Type # Methods from :: PackageConfig_ library executable -> Rep (PackageConfig_ library executable) x # to :: Rep (PackageConfig_ library executable) x -> PackageConfig_ library executable #
Generic (Rec1 f p)
Instance details Defined in GHC.Generics Associated Types type Rep (Rec1 f p) :: Type -> Type # Methods from :: Rec1 f p -> Rep (Rec1 f p) x # to :: Rep (Rec1 f p) x -> Rec1 f p #
Generic (URec (Ptr ()) p)
Instance details Defined in GHC.Generics Associated Types type Rep (URec (Ptr ()) p) :: Type -> Type # Methods from :: URec (Ptr ()) p -> Rep (URec (Ptr ()) p) x # to :: Rep (URec (Ptr ()) p) x -> URec (Ptr ()) p #
Generic (URec Char p)
Instance details Defined in GHC.Generics Associated Types type Rep (URec Char p) :: Type -> Type # Methods from :: URec Char p -> Rep (URec Char p) x # to :: Rep (URec Char p) x -> URec Char p #
Generic (URec Double p)
Instance details Defined in GHC.Generics Associated Types type Rep (URec Double p) :: Type -> Type # Methods from :: URec Double p -> Rep (URec Double p) x # to :: Rep (URec Double p) x -> URec Double p #
Generic (URec Float p)
Instance details Defined in GHC.Generics Associated Types type Rep (URec Float p) :: Type -> Type # Methods from :: URec Float p -> Rep (URec Float p) x # to :: Rep (URec Float p) x -> URec Float p #
Generic (URec Int p)
Instance details Defined in GHC.Generics Associated Types type Rep (URec Int p) :: Type -> Type # Methods from :: URec Int p -> Rep (URec Int p) x # to :: Rep (URec Int p) x -> URec Int p #
Generic (URec Word p)
Instance details Defined in GHC.Generics Associated Types type Rep (URec Word p) :: Type -> Type # Methods from :: URec Word p -> Rep (URec Word p) x # to :: Rep (URec Word p) x -> URec Word p #
Generic (a, b, c)
Instance details Defined in GHC.Generics Associated Types type Rep (a, b, c) :: Type -> Type # Methods from :: (a, b, c) -> Rep (a, b, c) x # to :: Rep (a, b, c) x -> (a, b, c) #
Generic (Const a b)
Instance details Defined in Data.Functor.Const Associated Types type Rep (Const a b) :: Type -> Type # Methods from :: Const a b -> Rep (Const a b) x # to :: Rep (Const a b) x -> Const a b #
Generic (WrappedArrow a b c)
Instance details Defined in Control.Applicative Associated Types type Rep (WrappedArrow a b c) :: Type -> Type # Methods from :: WrappedArrow a b c -> Rep (WrappedArrow a b c) x # to :: Rep (WrappedArrow a b c) x -> WrappedArrow a b c #
Generic (Ap f a)
Instance details Defined in Data.Monoid Associated Types type Rep (Ap f a) :: Type -> Type # Methods from :: Ap f a -> Rep (Ap f a) x # to :: Rep (Ap f a) x -> Ap f a #
Generic (Alt f a)
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep (Alt f a) :: Type -> Type # Methods from :: Alt f a -> Rep (Alt f a) x # to :: Rep (Alt f a) x -> Alt f a #
Generic (Tagged s b)
Instance details Defined in Data.Tagged Associated Types type Rep (Tagged s b) :: Type -> Type # Methods from :: Tagged s b -> Rep (Tagged s b) x # to :: Rep (Tagged s b) x -> Tagged s b #
Generic (K1 i c p)
Instance details Defined in GHC.Generics Associated Types type Rep (K1 i c p) :: Type -> Type # Methods from :: K1 i c p -> Rep (K1 i c p) x # to :: Rep (K1 i c p) x -> K1 i c p #
Generic ((f :+: g) p)
Instance details Defined in GHC.Generics Associated Types type Rep ((f :+: g) p) :: Type -> Type # Methods from :: (f :+: g) p -> Rep ((f :+: g) p) x # to :: Rep ((f :+: g) p) x -> (f :+: g) p #
Generic ((f :*: g) p)
Instance details Defined in GHC.Generics Associated Types type Rep ((f :: g) p) :: Type -> Type # Methods from :: (f :: g) p -> Rep ((f :: g) p) x # to :: Rep ((f :: g) p) x -> (f :*: g) p #
Generic (a, b, c, d)
Instance details Defined in GHC.Generics Associated Types type Rep (a, b, c, d) :: Type -> Type # Methods from :: (a, b, c, d) -> Rep (a, b, c, d) x # to :: Rep (a, b, c, d) x -> (a, b, c, d) #
Generic (Product f g a)
Instance details Defined in Data.Functor.Product Associated Types type Rep (Product f g a) :: Type -> Type # Methods from :: Product f g a -> Rep (Product f g a) x # to :: Rep (Product f g a) x -> Product f g a #
Generic (Sum f g a)
Instance details Defined in Data.Functor.Sum Associated Types type Rep (Sum f g a) :: Type -> Type # Methods from :: Sum f g a -> Rep (Sum f g a) x # to :: Rep (Sum f g a) x -> Sum f g a #
Generic (CommonOptions cSources cxxSources jsSources a)
Instance details Defined in Hpack.Config Associated Types type Rep (CommonOptions cSources cxxSources jsSources a) :: Type -> Type # Methods from :: CommonOptions cSources cxxSources jsSources a -> Rep (CommonOptions cSources cxxSources jsSources a) x # to :: Rep (CommonOptions cSources cxxSources jsSources a) x -> CommonOptions cSources cxxSources jsSources a #
Generic (ThenElse cSources cxxSources jsSources a)
Instance details Defined in Hpack.Config Associated Types type Rep (ThenElse cSources cxxSources jsSources a) :: Type -> Type # Methods from :: ThenElse cSources cxxSources jsSources a -> Rep (ThenElse cSources cxxSources jsSources a) x # to :: Rep (ThenElse cSources cxxSources jsSources a) x -> ThenElse cSources cxxSources jsSources a #
Generic (M1 i c f p)
Instance details Defined in GHC.Generics Associated Types type Rep (M1 i c f p) :: Type -> Type # Methods from :: M1 i c f p -> Rep (M1 i c f p) x # to :: Rep (M1 i c f p) x -> M1 i c f p #
Generic ((f :.: g) p)
Instance details Defined in GHC.Generics Associated Types type Rep ((f :.: g) p) :: Type -> Type # Methods from :: (f :.: g) p -> Rep ((f :.: g) p) x # to :: Rep ((f :.: g) p) x -> (f :.: g) p #
Generic (a, b, c, d, e)
Instance details Defined in GHC.Generics Associated Types type Rep (a, b, c, d, e) :: Type -> Type # Methods from :: (a, b, c, d, e) -> Rep (a, b, c, d, e) x # to :: Rep (a, b, c, d, e) x -> (a, b, c, d, e) #
Generic (Compose f g a)
Instance details Defined in Data.Functor.Compose Associated Types type Rep (Compose f g a) :: Type -> Type # Methods from :: Compose f g a -> Rep (Compose f g a) x # to :: Rep (Compose f g a) x -> Compose f g a #
Generic (Joker g a b)
Instance details Defined in Data.Bifunctor.Joker Associated Types type Rep (Joker g a b) :: Type -> Type # Methods from :: Joker g a b -> Rep (Joker g a b) x # to :: Rep (Joker g a b) x -> Joker g a b #
Generic (Clown f a b)
Instance details Defined in Data.Bifunctor.Clown Associated Types type Rep (Clown f a b) :: Type -> Type # Methods from :: Clown f a b -> Rep (Clown f a b) x # to :: Rep (Clown f a b) x -> Clown f a b #
Generic (a, b, c, d, e, f)
Instance details Defined in GHC.Generics Associated Types type Rep (a, b, c, d, e, f) :: Type -> Type # Methods from :: (a, b, c, d, e, f) -> Rep (a, b, c, d, e, f) x # to :: Rep (a, b, c, d, e, f) x -> (a, b, c, d, e, f) #
Generic (Sum p q a b)
Instance details Defined in Data.Bifunctor.Sum Associated Types type Rep (Sum p q a b) :: Type -> Type # Methods from :: Sum p q a b -> Rep (Sum p q a b) x # to :: Rep (Sum p q a b) x -> Sum p q a b #
Generic (Product f g a b)
Instance details Defined in Data.Bifunctor.Product Associated Types type Rep (Product f g a b) :: Type -> Type # Methods from :: Product f g a b -> Rep (Product f g a b) x # to :: Rep (Product f g a b) x -> Product f g a b #
Generic (a, b, c, d, e, f, g)
Instance details Defined in GHC.Generics Associated Types type Rep (a, b, c, d, e, f, g) :: Type -> Type # Methods from :: (a, b, c, d, e, f, g) -> Rep (a, b, c, d, e, f, g) x # to :: Rep (a, b, c, d, e, f, g) x -> (a, b, c, d, e, f, g) #
Generic (Tannen f p a b)
Instance details Defined in Data.Bifunctor.Tannen Associated Types type Rep (Tannen f p a b) :: Type -> Type # Methods from :: Tannen f p a b -> Rep (Tannen f p a b) x # to :: Rep (Tannen f p a b) x -> Tannen f p a b #
Generic (Biff p f g a b)
Instance details Defined in Data.Bifunctor.Biff Associated Types type Rep (Biff p f g a b) :: Type -> Type # Methods from :: Biff p f g a b -> Rep (Biff p f g a b) x # to :: Rep (Biff p f g a b) x -> Biff p f g a b #

class Semigroup a where #

The class of semigroups (types with an associative binary operation).

Instances should satisfy the associativity law:

```
x <> (y <> z) = (x <> y) <> z
```

Since: base-4.9.0.0

Minimal complete definition

(<>)

Methods

(<>) :: a -> a -> a infixr 6 #

An associative operation.

sconcat :: NonEmpty a -> a #

Reduce a non-empty list with <>

The default definition should be sufficient, but this can be overridden for efficiency.

stimes :: Integral b => b -> a -> a #

Repeat a value n times.

Given that this works on a Semigroup it is allowed to fail if you request 0 or fewer repetitions, and the default definition will do so.

By making this a member of the class, idempotent semigroups and monoids can upgrade this to execute in O(1) by picking stimes = stimesIdempotent or stimes = stimesIdempotentMonoid respectively.

Instances

Semigroup Ordering	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods (<>) :: Ordering -> Ordering -> Ordering # sconcat :: NonEmpty Ordering -> Ordering # stimes :: Integral b => b -> Ordering -> Ordering #
Semigroup ()	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods (<>) :: () -> () -> () # sconcat :: NonEmpty () -> () # stimes :: Integral b => b -> () -> () #
Semigroup Doc
Instance details Defined in Text.PrettyPrint.HughesPJ Methods (<>) :: Doc -> Doc -> Doc # sconcat :: NonEmpty Doc -> Doc # stimes :: Integral b => b -> Doc -> Doc #
Semigroup ByteString
Instance details Defined in Data.ByteString.Lazy.Internal Methods (<>) :: ByteString -> ByteString -> ByteString # sconcat :: NonEmpty ByteString -> ByteString # stimes :: Integral b => b -> ByteString -> ByteString #
Semigroup ShortByteString
Instance details Defined in Data.ByteString.Short.Internal Methods (<>) :: ShortByteString -> ShortByteString -> ShortByteString # sconcat :: NonEmpty ShortByteString -> ShortByteString # stimes :: Integral b => b -> ShortByteString -> ShortByteString #
Semigroup ByteString
Instance details Defined in Data.ByteString.Internal Methods (<>) :: ByteString -> ByteString -> ByteString # sconcat :: NonEmpty ByteString -> ByteString # stimes :: Integral b => b -> ByteString -> ByteString #
Semigroup UnqualComponentName
Instance details Defined in Distribution.Types.UnqualComponentName Methods (<>) :: UnqualComponentName -> UnqualComponentName -> UnqualComponentName # sconcat :: NonEmpty UnqualComponentName -> UnqualComponentName # stimes :: Integral b => b -> UnqualComponentName -> UnqualComponentName #
Semigroup ShortText
Instance details Defined in Distribution.Utils.ShortText Methods (<>) :: ShortText -> ShortText -> ShortText # sconcat :: NonEmpty ShortText -> ShortText # stimes :: Integral b => b -> ShortText -> ShortText #
Semigroup Any	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup.Internal Methods (<>) :: Any -> Any -> Any # sconcat :: NonEmpty Any -> Any # stimes :: Integral b => b -> Any -> Any #
Semigroup All	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup.Internal Methods (<>) :: All -> All -> All # sconcat :: NonEmpty All -> All # stimes :: Integral b => b -> All -> All #
Semigroup Builder
Instance details Defined in Data.ByteString.Builder.Internal Methods (<>) :: Builder -> Builder -> Builder # sconcat :: NonEmpty Builder -> Builder # stimes :: Integral b => b -> Builder -> Builder #
Semigroup Series
Instance details Defined in Data.Aeson.Encoding.Internal Methods (<>) :: Series -> Series -> Series # sconcat :: NonEmpty Series -> Series # stimes :: Integral b => b -> Series -> Series #
Semigroup More
Instance details Defined in Data.Attoparsec.Internal.Types Methods (<>) :: More -> More -> More # sconcat :: NonEmpty More -> More # stimes :: Integral b => b -> More -> More #
Semigroup Void	Since: base-4.9.0.0
Instance details Defined in Data.Void Methods (<>) :: Void -> Void -> Void # sconcat :: NonEmpty Void -> Void # stimes :: Integral b => b -> Void -> Void #
Semigroup String
Instance details Defined in Basement.UTF8.Base Methods (<>) :: String -> String -> String # sconcat :: NonEmpty String -> String # stimes :: Integral b => b -> String -> String #
Semigroup IntSet	Since: containers-0.5.7
Instance details Defined in Data.IntSet.Internal Methods (<>) :: IntSet -> IntSet -> IntSet # sconcat :: NonEmpty IntSet -> IntSet # stimes :: Integral b => b -> IntSet -> IntSet #
Semigroup BuildTools
Instance details Defined in Hpack.Syntax.BuildTools Methods (<>) :: BuildTools -> BuildTools -> BuildTools # sconcat :: NonEmpty BuildTools -> BuildTools # stimes :: Integral b => b -> BuildTools -> BuildTools #
Semigroup SystemBuildTools
Instance details Defined in Hpack.Syntax.BuildTools Methods (<>) :: SystemBuildTools -> SystemBuildTools -> SystemBuildTools # sconcat :: NonEmpty SystemBuildTools -> SystemBuildTools # stimes :: Integral b => b -> SystemBuildTools -> SystemBuildTools #
Semigroup Dependencies
Instance details Defined in Hpack.Syntax.Dependencies Methods (<>) :: Dependencies -> Dependencies -> Dependencies # sconcat :: NonEmpty Dependencies -> Dependencies # stimes :: Integral b => b -> Dependencies -> Dependencies #
Semigroup CookieJar
Instance details Defined in Network.HTTP.Client.Types Methods (<>) :: CookieJar -> CookieJar -> CookieJar # sconcat :: NonEmpty CookieJar -> CookieJar # stimes :: Integral b => b -> CookieJar -> CookieJar #
Semigroup RequestBody
Instance details Defined in Network.HTTP.Client.Types Methods (<>) :: RequestBody -> RequestBody -> RequestBody # sconcat :: NonEmpty RequestBody -> RequestBody # stimes :: Integral b => b -> RequestBody -> RequestBody #
Semigroup Pos
Instance details Defined in Text.Megaparsec.Pos Methods (<>) :: Pos -> Pos -> Pos # sconcat :: NonEmpty Pos -> Pos # stimes :: Integral b => b -> Pos -> Pos #
Semigroup ByteArray
Instance details Defined in Data.Primitive.ByteArray Methods (<>) :: ByteArray -> ByteArray -> ByteArray # sconcat :: NonEmpty ByteArray -> ByteArray # stimes :: Integral b => b -> ByteArray -> ByteArray #
Semigroup Empty
Instance details Defined in Hpack.Config Methods (<>) :: Empty -> Empty -> Empty # sconcat :: NonEmpty Empty -> Empty # stimes :: Integral b => b -> Empty -> Empty #
Semigroup ExecutableSection
Instance details Defined in Hpack.Config Methods (<>) :: ExecutableSection -> ExecutableSection -> ExecutableSection # sconcat :: NonEmpty ExecutableSection -> ExecutableSection # stimes :: Integral b => b -> ExecutableSection -> ExecutableSection #
Semigroup LibrarySection
Instance details Defined in Hpack.Config Methods (<>) :: LibrarySection -> LibrarySection -> LibrarySection # sconcat :: NonEmpty LibrarySection -> LibrarySection # stimes :: Integral b => b -> LibrarySection -> LibrarySection #
Semigroup [a]	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods (<>) :: [a] -> [a] -> [a] # sconcat :: NonEmpty [a] -> [a] # stimes :: Integral b => b -> [a] -> [a] #
Semigroup a => Semigroup (Maybe a)	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods (<>) :: Maybe a -> Maybe a -> Maybe a # sconcat :: NonEmpty (Maybe a) -> Maybe a # stimes :: Integral b => b -> Maybe a -> Maybe a #
Semigroup a => Semigroup (IO a)	Since: base-4.10.0.0
Instance details Defined in GHC.Base Methods (<>) :: IO a -> IO a -> IO a # sconcat :: NonEmpty (IO a) -> IO a # stimes :: Integral b => b -> IO a -> IO a #
Semigroup p => Semigroup (Par1 p)	Since: base-4.12.0.0
Instance details Defined in GHC.Generics Methods (<>) :: Par1 p -> Par1 p -> Par1 p # sconcat :: NonEmpty (Par1 p) -> Par1 p # stimes :: Integral b => b -> Par1 p -> Par1 p #
Semigroup (Last a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: Last a -> Last a -> Last a # sconcat :: NonEmpty (Last a) -> Last a # stimes :: Integral b => b -> Last a -> Last a #
Semigroup (Last' a)
Instance details Defined in Distribution.Compat.Semigroup Methods (<>) :: Last' a -> Last' a -> Last' a # sconcat :: NonEmpty (Last' a) -> Last' a # stimes :: Integral b => b -> Last' a -> Last' a #
Ord a => Semigroup (Set a)	Since: containers-0.5.7
Instance details Defined in Data.Set.Internal Methods (<>) :: Set a -> Set a -> Set a # sconcat :: NonEmpty (Set a) -> Set a # stimes :: Integral b => b -> Set a -> Set a #
Semigroup a => Semigroup (Identity a)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Identity Methods (<>) :: Identity a -> Identity a -> Identity a # sconcat :: NonEmpty (Identity a) -> Identity a # stimes :: Integral b => b -> Identity a -> Identity a #
Semigroup (IResult a)
Instance details Defined in Data.Aeson.Types.Internal Methods (<>) :: IResult a -> IResult a -> IResult a # sconcat :: NonEmpty (IResult a) -> IResult a # stimes :: Integral b => b -> IResult a -> IResult a #
Semigroup (Result a)
Instance details Defined in Data.Aeson.Types.Internal Methods (<>) :: Result a -> Result a -> Result a # sconcat :: NonEmpty (Result a) -> Result a # stimes :: Integral b => b -> Result a -> Result a #
Semigroup (Parser a)
Instance details Defined in Data.Aeson.Types.Internal Methods (<>) :: Parser a -> Parser a -> Parser a # sconcat :: NonEmpty (Parser a) -> Parser a # stimes :: Integral b => b -> Parser a -> Parser a #
Ord a => Semigroup (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: Min a -> Min a -> Min a # sconcat :: NonEmpty (Min a) -> Min a # stimes :: Integral b => b -> Min a -> Min a #
Ord a => Semigroup (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: Max a -> Max a -> Max a # sconcat :: NonEmpty (Max a) -> Max a # stimes :: Integral b => b -> Max a -> Max a #
Semigroup (First a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: First a -> First a -> First a # sconcat :: NonEmpty (First a) -> First a # stimes :: Integral b => b -> First a -> First a #
Monoid m => Semigroup (WrappedMonoid m)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: WrappedMonoid m -> WrappedMonoid m -> WrappedMonoid m # sconcat :: NonEmpty (WrappedMonoid m) -> WrappedMonoid m # stimes :: Integral b => b -> WrappedMonoid m -> WrappedMonoid m #
Semigroup a => Semigroup (Option a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: Option a -> Option a -> Option a # sconcat :: NonEmpty (Option a) -> Option a # stimes :: Integral b => b -> Option a -> Option a #
Semigroup (First a)	Since: base-4.9.0.0
Instance details Defined in Data.Monoid Methods (<>) :: First a -> First a -> First a # sconcat :: NonEmpty (First a) -> First a # stimes :: Integral b => b -> First a -> First a #
Semigroup (Last a)	Since: base-4.9.0.0
Instance details Defined in Data.Monoid Methods (<>) :: Last a -> Last a -> Last a # sconcat :: NonEmpty (Last a) -> Last a # stimes :: Integral b => b -> Last a -> Last a #
Semigroup a => Semigroup (Dual a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup.Internal Methods (<>) :: Dual a -> Dual a -> Dual a # sconcat :: NonEmpty (Dual a) -> Dual a # stimes :: Integral b => b -> Dual a -> Dual a #
Semigroup (Endo a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup.Internal Methods (<>) :: Endo a -> Endo a -> Endo a # sconcat :: NonEmpty (Endo a) -> Endo a # stimes :: Integral b => b -> Endo a -> Endo a #
Num a => Semigroup (Sum a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup.Internal Methods (<>) :: Sum a -> Sum a -> Sum a # sconcat :: NonEmpty (Sum a) -> Sum a # stimes :: Integral b => b -> Sum a -> Sum a #
Num a => Semigroup (Product a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup.Internal Methods (<>) :: Product a -> Product a -> Product a # sconcat :: NonEmpty (Product a) -> Product a # stimes :: Integral b => b -> Product a -> Product a #
Semigroup a => Semigroup (Down a)	Since: base-4.11.0.0
Instance details Defined in Data.Ord Methods (<>) :: Down a -> Down a -> Down a # sconcat :: NonEmpty (Down a) -> Down a # stimes :: Integral b => b -> Down a -> Down a #
Semigroup (NonEmpty a)	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods (<>) :: NonEmpty a -> NonEmpty a -> NonEmpty a # sconcat :: NonEmpty (NonEmpty a) -> NonEmpty a # stimes :: Integral b => b -> NonEmpty a -> NonEmpty a #
PrimType ty => Semigroup (UArray ty)
Instance details Defined in Basement.UArray.Base Methods (<>) :: UArray ty -> UArray ty -> UArray ty # sconcat :: NonEmpty (UArray ty) -> UArray ty # stimes :: Integral b => b -> UArray ty -> UArray ty #
PrimType ty => Semigroup (Block ty)
Instance details Defined in Basement.Block.Base Methods (<>) :: Block ty -> Block ty -> Block ty # sconcat :: NonEmpty (Block ty) -> Block ty # stimes :: Integral b => b -> Block ty -> Block ty #
Semigroup (CountOf ty)
Instance details Defined in Basement.Types.OffsetSize Methods (<>) :: CountOf ty -> CountOf ty -> CountOf ty # sconcat :: NonEmpty (CountOf ty) -> CountOf ty # stimes :: Integral b => b -> CountOf ty -> CountOf ty #
Semigroup (IntMap a)	Since: containers-0.5.7
Instance details Defined in Data.IntMap.Internal Methods (<>) :: IntMap a -> IntMap a -> IntMap a # sconcat :: NonEmpty (IntMap a) -> IntMap a # stimes :: Integral b => b -> IntMap a -> IntMap a #
Semigroup (Seq a)	Since: containers-0.5.7
Instance details Defined in Data.Sequence.Internal Methods (<>) :: Seq a -> Seq a -> Seq a # sconcat :: NonEmpty (Seq a) -> Seq a # stimes :: Integral b => b -> Seq a -> Seq a #
Semigroup (DList a)
Instance details Defined in Data.DList Methods (<>) :: DList a -> DList a -> DList a # sconcat :: NonEmpty (DList a) -> DList a # stimes :: Integral b => b -> DList a -> DList a #
Semigroup m => Semigroup (ParseResult m)
Instance details Defined in Language.Haskell.Exts.ParseMonad Methods (<>) :: ParseResult m -> ParseResult m -> ParseResult m # sconcat :: NonEmpty (ParseResult m) -> ParseResult m # stimes :: Integral b => b -> ParseResult m -> ParseResult m #
Semigroup (List a)
Instance details Defined in Data.Aeson.Config.Types Methods (<>) :: List a -> List a -> List a # sconcat :: NonEmpty (List a) -> List a # stimes :: Integral b => b -> List a -> List a #
Prim a => Semigroup (Vector a)
Instance details Defined in Data.Vector.Primitive Methods (<>) :: Vector a -> Vector a -> Vector a # sconcat :: NonEmpty (Vector a) -> Vector a # stimes :: Integral b => b -> Vector a -> Vector a #
Storable a => Semigroup (Vector a)
Instance details Defined in Data.Vector.Storable Methods (<>) :: Vector a -> Vector a -> Vector a # sconcat :: NonEmpty (Vector a) -> Vector a # stimes :: Integral b => b -> Vector a -> Vector a #
(Hashable a, Eq a) => Semigroup (HashSet a)
Instance details Defined in Data.HashSet Methods (<>) :: HashSet a -> HashSet a -> HashSet a # sconcat :: NonEmpty (HashSet a) -> HashSet a # stimes :: Integral b => b -> HashSet a -> HashSet a #
Semigroup (Vector a)
Instance details Defined in Data.Vector Methods (<>) :: Vector a -> Vector a -> Vector a # sconcat :: NonEmpty (Vector a) -> Vector a # stimes :: Integral b => b -> Vector a -> Vector a #
Semigroup (Hints t)
Instance details Defined in Text.Megaparsec.Internal Methods (<>) :: Hints t -> Hints t -> Hints t # sconcat :: NonEmpty (Hints t) -> Hints t # stimes :: Integral b => b -> Hints t -> Hints t #
Semigroup (Doc a)
Instance details Defined in Text.PrettyPrint.Annotated.HughesPJ Methods (<>) :: Doc a -> Doc a -> Doc a # sconcat :: NonEmpty (Doc a) -> Doc a # stimes :: Integral b => b -> Doc a -> Doc a #
PrimUnlifted a => Semigroup (UnliftedArray a)	Since: primitive-0.6.4.0
Instance details Defined in Data.Primitive.UnliftedArray Methods (<>) :: UnliftedArray a -> UnliftedArray a -> UnliftedArray a # sconcat :: NonEmpty (UnliftedArray a) -> UnliftedArray a # stimes :: Integral b => b -> UnliftedArray a -> UnliftedArray a #
Semigroup (PrimArray a)	Since: primitive-0.6.4.0
Instance details Defined in Data.Primitive.PrimArray Methods (<>) :: PrimArray a -> PrimArray a -> PrimArray a # sconcat :: NonEmpty (PrimArray a) -> PrimArray a # stimes :: Integral b => b -> PrimArray a -> PrimArray a #
Semigroup (SmallArray a)	Since: primitive-0.6.3.0
Instance details Defined in Data.Primitive.SmallArray Methods (<>) :: SmallArray a -> SmallArray a -> SmallArray a # sconcat :: NonEmpty (SmallArray a) -> SmallArray a # stimes :: Integral b => b -> SmallArray a -> SmallArray a #
Semigroup (Array a)	Since: primitive-0.6.3.0
Instance details Defined in Data.Primitive.Array Methods (<>) :: Array a -> Array a -> Array a # sconcat :: NonEmpty (Array a) -> Array a # stimes :: Integral b => b -> Array a -> Array a #
Semigroup (MergeSet a)
Instance details Defined in Data.Set.Internal Methods (<>) :: MergeSet a -> MergeSet a -> MergeSet a # sconcat :: NonEmpty (MergeSet a) -> MergeSet a # stimes :: Integral b => b -> MergeSet a -> MergeSet a #
Semigroup b => Semigroup (a -> b)	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods (<>) :: (a -> b) -> (a -> b) -> a -> b # sconcat :: NonEmpty (a -> b) -> a -> b # stimes :: Integral b0 => b0 -> (a -> b) -> a -> b #
Semigroup (Either a b)	Since: base-4.9.0.0
Instance details Defined in Data.Either Methods (<>) :: Either a b -> Either a b -> Either a b # sconcat :: NonEmpty (Either a b) -> Either a b # stimes :: Integral b0 => b0 -> Either a b -> Either a b #
Semigroup (V1 p)	Since: base-4.12.0.0
Instance details Defined in GHC.Generics Methods (<>) :: V1 p -> V1 p -> V1 p # sconcat :: NonEmpty (V1 p) -> V1 p # stimes :: Integral b => b -> V1 p -> V1 p #
Semigroup (U1 p)	Since: base-4.12.0.0
Instance details Defined in GHC.Generics Methods (<>) :: U1 p -> U1 p -> U1 p # sconcat :: NonEmpty (U1 p) -> U1 p # stimes :: Integral b => b -> U1 p -> U1 p #
(Semigroup a, Semigroup b) => Semigroup (a, b)	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods (<>) :: (a, b) -> (a, b) -> (a, b) # sconcat :: NonEmpty (a, b) -> (a, b) # stimes :: Integral b0 => b0 -> (a, b) -> (a, b) #
Ord k => Semigroup (Map k v)
Instance details Defined in Data.Map.Internal Methods (<>) :: Map k v -> Map k v -> Map k v # sconcat :: NonEmpty (Map k v) -> Map k v # stimes :: Integral b => b -> Map k v -> Map k v #
(Eq k, Hashable k) => Semigroup (HashMap k v)
Instance details Defined in Data.HashMap.Base Methods (<>) :: HashMap k v -> HashMap k v -> HashMap k v # sconcat :: NonEmpty (HashMap k v) -> HashMap k v # stimes :: Integral b => b -> HashMap k v -> HashMap k v #
Semigroup (Parser i a)
Instance details Defined in Data.Attoparsec.Internal.Types Methods (<>) :: Parser i a -> Parser i a -> Parser i a # sconcat :: NonEmpty (Parser i a) -> Parser i a # stimes :: Integral b => b -> Parser i a -> Parser i a #
Semigroup (Proxy s)	Since: base-4.9.0.0
Instance details Defined in Data.Proxy Methods (<>) :: Proxy s -> Proxy s -> Proxy s # sconcat :: NonEmpty (Proxy s) -> Proxy s # stimes :: Integral b => b -> Proxy s -> Proxy s #
(Semigroup a, Semigroup b) => Semigroup (Product a b)
Instance details Defined in Data.Aeson.Config.Types Methods (<>) :: Product a b -> Product a b -> Product a b # sconcat :: NonEmpty (Product a b) -> Product a b # stimes :: Integral b0 => b0 -> Product a b -> Product a b #
(Stream s, Ord e) => Semigroup (ParseError s e)
Instance details Defined in Text.Megaparsec.Error Methods (<>) :: ParseError s e -> ParseError s e -> ParseError s e # sconcat :: NonEmpty (ParseError s e) -> ParseError s e # stimes :: Integral b => b -> ParseError s e -> ParseError s e #
Semigroup (f p) => Semigroup (Rec1 f p)	Since: base-4.12.0.0
Instance details Defined in GHC.Generics Methods (<>) :: Rec1 f p -> Rec1 f p -> Rec1 f p # sconcat :: NonEmpty (Rec1 f p) -> Rec1 f p # stimes :: Integral b => b -> Rec1 f p -> Rec1 f p #
(Semigroup a, Semigroup b, Semigroup c) => Semigroup (a, b, c)	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods (<>) :: (a, b, c) -> (a, b, c) -> (a, b, c) # sconcat :: NonEmpty (a, b, c) -> (a, b, c) # stimes :: Integral b0 => b0 -> (a, b, c) -> (a, b, c) #
Semigroup a => Semigroup (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods (<>) :: Const a b -> Const a b -> Const a b # sconcat :: NonEmpty (Const a b) -> Const a b # stimes :: Integral b0 => b0 -> Const a b -> Const a b #
(Applicative f, Semigroup a) => Semigroup (Ap f a)	Since: base-4.12.0.0
Instance details Defined in Data.Monoid Methods (<>) :: Ap f a -> Ap f a -> Ap f a # sconcat :: NonEmpty (Ap f a) -> Ap f a # stimes :: Integral b => b -> Ap f a -> Ap f a #
Alternative f => Semigroup (Alt f a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup.Internal Methods (<>) :: Alt f a -> Alt f a -> Alt f a # sconcat :: NonEmpty (Alt f a) -> Alt f a # stimes :: Integral b => b -> Alt f a -> Alt f a #
Semigroup a => Semigroup (Tagged s a)
Instance details Defined in Data.Tagged Methods (<>) :: Tagged s a -> Tagged s a -> Tagged s a # sconcat :: NonEmpty (Tagged s a) -> Tagged s a # stimes :: Integral b => b -> Tagged s a -> Tagged s a #
Semigroup c => Semigroup (K1 i c p)	Since: base-4.12.0.0
Instance details Defined in GHC.Generics Methods (<>) :: K1 i c p -> K1 i c p -> K1 i c p # sconcat :: NonEmpty (K1 i c p) -> K1 i c p # stimes :: Integral b => b -> K1 i c p -> K1 i c p #
(Semigroup (f p), Semigroup (g p)) => Semigroup ((f :*: g) p)	Since: base-4.12.0.0
Instance details Defined in GHC.Generics Methods (<>) :: (f :: g) p -> (f :: g) p -> (f :: g) p # sconcat :: NonEmpty ((f :: g) p) -> (f :: g) p # stimes :: Integral b => b -> (f :: g) p -> (f :*: g) p #
(Semigroup a, Semigroup b, Semigroup c, Semigroup d) => Semigroup (a, b, c, d)	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods (<>) :: (a, b, c, d) -> (a, b, c, d) -> (a, b, c, d) # sconcat :: NonEmpty (a, b, c, d) -> (a, b, c, d) # stimes :: Integral b0 => b0 -> (a, b, c, d) -> (a, b, c, d) #
Monad m => Semigroup (ConduitT i o m ())
Instance details Defined in Data.Conduit.Internal.Conduit Methods (<>) :: ConduitT i o m () -> ConduitT i o m () -> ConduitT i o m () # sconcat :: NonEmpty (ConduitT i o m ()) -> ConduitT i o m () # stimes :: Integral b => b -> ConduitT i o m () -> ConduitT i o m () #
(Stream s, Semigroup a) => Semigroup (ParsecT e s m a)	Since: megaparsec-5.3.0
Instance details Defined in Text.Megaparsec.Internal Methods (<>) :: ParsecT e s m a -> ParsecT e s m a -> ParsecT e s m a # sconcat :: NonEmpty (ParsecT e s m a) -> ParsecT e s m a # stimes :: Integral b => b -> ParsecT e s m a -> ParsecT e s m a #
(Semigroup cSources, Semigroup cxxSources, Semigroup jsSources) => Semigroup (CommonOptions cSources cxxSources jsSources a)
Instance details Defined in Hpack.Config Methods (<>) :: CommonOptions cSources cxxSources jsSources a -> CommonOptions cSources cxxSources jsSources a -> CommonOptions cSources cxxSources jsSources a # sconcat :: NonEmpty (CommonOptions cSources cxxSources jsSources a) -> CommonOptions cSources cxxSources jsSources a # stimes :: Integral b => b -> CommonOptions cSources cxxSources jsSources a -> CommonOptions cSources cxxSources jsSources a #
Semigroup (f p) => Semigroup (M1 i c f p)	Since: base-4.12.0.0
Instance details Defined in GHC.Generics Methods (<>) :: M1 i c f p -> M1 i c f p -> M1 i c f p # sconcat :: NonEmpty (M1 i c f p) -> M1 i c f p # stimes :: Integral b => b -> M1 i c f p -> M1 i c f p #
Semigroup (f (g p)) => Semigroup ((f :.: g) p)	Since: base-4.12.0.0
Instance details Defined in GHC.Generics Methods (<>) :: (f :.: g) p -> (f :.: g) p -> (f :.: g) p # sconcat :: NonEmpty ((f :.: g) p) -> (f :.: g) p # stimes :: Integral b => b -> (f :.: g) p -> (f :.: g) p #
(Semigroup a, Semigroup b, Semigroup c, Semigroup d, Semigroup e) => Semigroup (a, b, c, d, e)	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods (<>) :: (a, b, c, d, e) -> (a, b, c, d, e) -> (a, b, c, d, e) # sconcat :: NonEmpty (a, b, c, d, e) -> (a, b, c, d, e) # stimes :: Integral b0 => b0 -> (a, b, c, d, e) -> (a, b, c, d, e) #
Monad m => Semigroup (Pipe l i o u m ())
Instance details Defined in Data.Conduit.Internal.Pipe Methods (<>) :: Pipe l i o u m () -> Pipe l i o u m () -> Pipe l i o u m () # sconcat :: NonEmpty (Pipe l i o u m ()) -> Pipe l i o u m () # stimes :: Integral b => b -> Pipe l i o u m () -> Pipe l i o u m () #

data Char #

The character type Char is an enumeration whose values represent Unicode (or equivalently ISO/IEC 10646) code points (i.e. characters, see http://www.unicode.org/ for details). This set extends the ISO 8859-1 (Latin-1) character set (the first 256 characters), which is itself an extension of the ASCII character set (the first 128 characters). A character literal in Haskell has type Char.

To convert a Char to or from the corresponding Int value defined by Unicode, use toEnum and fromEnum from the Enum class respectively (or equivalently ord and chr).

Instances

Bounded Char	Since: base-2.1
Instance details Defined in GHC.Enum Methods minBound :: Char # maxBound :: Char #
Enum Char	Since: base-2.1
Instance details Defined in GHC.Enum Methods succ :: Char -> Char # pred :: Char -> Char # toEnum :: Int -> Char # fromEnum :: Char -> Int # enumFrom :: Char -> [Char] # enumFromThen :: Char -> Char -> [Char] # enumFromTo :: Char -> Char -> [Char] # enumFromThenTo :: Char -> Char -> Char -> [Char] #
Eq Char
Instance details Defined in GHC.Classes Methods (==) :: Char -> Char -> Bool # (/=) :: Char -> Char -> Bool #
Data Char	Since: base-4.0.0.0
Instance details Defined in Data.Data Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Char -> c Char # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Char # toConstr :: Char -> Constr # dataTypeOf :: Char -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Char) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Char) # gmapT :: (forall b. Data b => b -> b) -> Char -> Char # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Char -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Char -> r # gmapQ :: (forall d. Data d => d -> u) -> Char -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Char -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Char -> m Char # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Char -> m Char # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Char -> m Char #
Ord Char
Instance details Defined in GHC.Classes Methods compare :: Char -> Char -> Ordering # (<) :: Char -> Char -> Bool # (<=) :: Char -> Char -> Bool # (>) :: Char -> Char -> Bool # (>=) :: Char -> Char -> Bool # max :: Char -> Char -> Char # min :: Char -> Char -> Char #
Read Char	Since: base-2.1
Instance details Defined in GHC.Read Methods readsPrec :: Int -> ReadS Char # readList :: ReadS [Char] # readPrec :: ReadPrec Char # readListPrec :: ReadPrec [Char] #
Show Char	Since: base-2.1
Instance details Defined in GHC.Show Methods showsPrec :: Int -> Char -> ShowS # show :: Char -> String # showList :: [Char] -> ShowS #
Lift Char
Instance details Defined in Language.Haskell.TH.Syntax Methods lift :: Char -> Q Exp #
NFData Char
Instance details Defined in Control.DeepSeq Methods rnf :: Char -> () #
Hashable Char
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Char -> Int # hash :: Char -> Int #
ToJSON Char
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: Char -> Value # toEncoding :: Char -> Encoding # toJSONList :: [Char] -> Value # toEncodingList :: [Char] -> Encoding #
ToJSONKey Char
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSONKey :: ToJSONKeyFunction Char # toJSONKeyList :: ToJSONKeyFunction [Char] #
FromJSON Char
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser Char # parseJSONList :: Value -> Parser [Char] #
FromJSONKey Char
Instance details Defined in Data.Aeson.Types.FromJSON Methods fromJSONKey :: FromJSONKeyFunction Char # fromJSONKeyList :: FromJSONKeyFunction [Char] #
PrintfArg Char	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Char -> FieldFormatter # parseFormat :: Char -> ModifierParser #
IsChar Char	Since: base-2.1
Instance details Defined in Text.Printf Methods toChar :: Char -> Char # fromChar :: Char -> Char #
Storable Char	Since: base-2.1
Instance details Defined in Foreign.Storable Methods sizeOf :: Char -> Int # alignment :: Char -> Int # peekElemOff :: Ptr Char -> Int -> IO Char # pokeElemOff :: Ptr Char -> Int -> Char -> IO () # peekByteOff :: Ptr b -> Int -> IO Char # pokeByteOff :: Ptr b -> Int -> Char -> IO () # peek :: Ptr Char -> IO Char # poke :: Ptr Char -> Char -> IO () #
PrimType Char
Instance details Defined in Basement.PrimType Associated Types type PrimSize Char :: Nat # Methods primSizeInBytes :: Proxy Char -> CountOf Word8 # primShiftToBytes :: Proxy Char -> Int # primBaUIndex :: ByteArray# -> Offset Char -> Char # primMbaURead :: PrimMonad prim => MutableByteArray# (PrimState prim) -> Offset Char -> prim Char # primMbaUWrite :: PrimMonad prim => MutableByteArray# (PrimState prim) -> Offset Char -> Char -> prim () # primAddrIndex :: Addr# -> Offset Char -> Char # primAddrRead :: PrimMonad prim => Addr# -> Offset Char -> prim Char # primAddrWrite :: PrimMonad prim => Addr# -> Offset Char -> Char -> prim () #
PrimMemoryComparable Char
Instance details Defined in Basement.PrimType
Subtractive Char
Instance details Defined in Basement.Numerical.Subtractive Associated Types type Difference Char :: Type # Methods (-) :: Char -> Char -> Difference Char #
CurlBuffer String
Instance details Defined in Network.Curl Methods newIncoming :: IO (IO String, CStringLen -> IO ()) #
FromValue ParsePackageConfig
Instance details Defined in Hpack.Config Methods fromValue :: Value -> Parser ParsePackageConfig #
Prim Char
Instance details Defined in Data.Primitive.Types Methods sizeOf# :: Char -> Int# # alignment# :: Char -> Int# # indexByteArray# :: ByteArray# -> Int# -> Char # readByteArray# :: MutableByteArray# s -> Int# -> State# s -> (#State# s, Char#) # writeByteArray# :: MutableByteArray# s -> Int# -> Char -> State# s -> State# s # setByteArray# :: MutableByteArray# s -> Int# -> Int# -> Char -> State# s -> State# s # indexOffAddr# :: Addr# -> Int# -> Char # readOffAddr# :: Addr# -> Int# -> State# s -> (#State# s, Char#) # writeOffAddr# :: Addr# -> Int# -> Char -> State# s -> State# s # setOffAddr# :: Addr# -> Int# -> Int# -> Char -> State# s -> State# s #
Unbox Char
Instance details Defined in Data.Vector.Unboxed.Base
Stream String
Instance details Defined in Text.Megaparsec.Stream Associated Types type Token String :: Type # type Tokens String :: Type # Methods tokenToChunk :: Proxy String -> Token String -> Tokens String # tokensToChunk :: Proxy String -> [Token String] -> Tokens String # chunkToTokens :: Proxy String -> Tokens String -> [Token String] # chunkLength :: Proxy String -> Tokens String -> Int # chunkEmpty :: Proxy String -> Tokens String -> Bool # take1_ :: String -> Maybe (Token String, String) # takeN_ :: Int -> String -> Maybe (Tokens String, String) # takeWhile_ :: (Token String -> Bool) -> String -> (Tokens String, String) # showTokens :: Proxy String -> NonEmpty (Token String) -> String # reachOffset :: Int -> PosState String -> (SourcePos, String, PosState String) # reachOffsetNoLine :: Int -> PosState String -> (SourcePos, PosState String) #
ErrorList Char
Instance details Defined in Control.Monad.Trans.Error Methods listMsg :: String -> [Char] #
Vector Vector Char
Instance details Defined in Data.Vector.Unboxed.Base Methods basicUnsafeFreeze :: PrimMonad m => Mutable Vector (PrimState m) Char -> m (Vector Char) # basicUnsafeThaw :: PrimMonad m => Vector Char -> m (Mutable Vector (PrimState m) Char) # basicLength :: Vector Char -> Int # basicUnsafeSlice :: Int -> Int -> Vector Char -> Vector Char # basicUnsafeIndexM :: Monad m => Vector Char -> Int -> m Char # basicUnsafeCopy :: PrimMonad m => Mutable Vector (PrimState m) Char -> Vector Char -> m () # elemseq :: Vector Char -> Char -> b -> b #
MVector MVector Char
Instance details Defined in Data.Vector.Unboxed.Base Methods basicLength :: MVector s Char -> Int # basicUnsafeSlice :: Int -> Int -> MVector s Char -> MVector s Char # basicOverlaps :: MVector s Char -> MVector s Char -> Bool # basicUnsafeNew :: PrimMonad m => Int -> m (MVector (PrimState m) Char) # basicInitialize :: PrimMonad m => MVector (PrimState m) Char -> m () # basicUnsafeReplicate :: PrimMonad m => Int -> Char -> m (MVector (PrimState m) Char) # basicUnsafeRead :: PrimMonad m => MVector (PrimState m) Char -> Int -> m Char # basicUnsafeWrite :: PrimMonad m => MVector (PrimState m) Char -> Int -> Char -> m () # basicClear :: PrimMonad m => MVector (PrimState m) Char -> m () # basicSet :: PrimMonad m => MVector (PrimState m) Char -> Char -> m () # basicUnsafeCopy :: PrimMonad m => MVector (PrimState m) Char -> MVector (PrimState m) Char -> m () # basicUnsafeMove :: PrimMonad m => MVector (PrimState m) Char -> MVector (PrimState m) Char -> m () # basicUnsafeGrow :: PrimMonad m => MVector (PrimState m) Char -> Int -> m (MVector (PrimState m) Char) #
Generic1 (URec Char :: k -> Type)
Instance details Defined in GHC.Generics Associated Types type Rep1 (URec Char) :: k -> Type # Methods from1 :: URec Char a -> Rep1 (URec Char) a # to1 :: Rep1 (URec Char) a -> URec Char a #
CurlHeader [(String, String)]
Instance details Defined in Network.Curl Methods newIncomingHeader :: IO (IO (String, [(String, String)]), CStringLen -> IO ()) #
FromValue a => FromValue (ParseCommonOptions a)
Instance details Defined in Hpack.Config Methods fromValue :: Value -> Parser (ParseCommonOptions a) #
FromValue a => FromValue (ParseConditionalSection a)
Instance details Defined in Hpack.Config Methods fromValue :: Value -> Parser (ParseConditionalSection a) #
FromValue a => FromValue (ParseThenElse a)
Instance details Defined in Hpack.Config Methods fromValue :: Value -> Parser (ParseThenElse a) #
Functor (URec Char :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods fmap :: (a -> b) -> URec Char a -> URec Char b # (<$) :: a -> URec Char b -> URec Char a #
Foldable (URec Char :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => URec Char m -> m # foldMap :: Monoid m => (a -> m) -> URec Char a -> m # foldr :: (a -> b -> b) -> b -> URec Char a -> b # foldr' :: (a -> b -> b) -> b -> URec Char a -> b # foldl :: (b -> a -> b) -> b -> URec Char a -> b # foldl' :: (b -> a -> b) -> b -> URec Char a -> b # foldr1 :: (a -> a -> a) -> URec Char a -> a # foldl1 :: (a -> a -> a) -> URec Char a -> a # toList :: URec Char a -> [a] # null :: URec Char a -> Bool # length :: URec Char a -> Int # elem :: Eq a => a -> URec Char a -> Bool # maximum :: Ord a => URec Char a -> a # minimum :: Ord a => URec Char a -> a # sum :: Num a => URec Char a -> a # product :: Num a => URec Char a -> a #
Traversable (URec Char :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> URec Char a -> f (URec Char b) # sequenceA :: Applicative f => URec Char (f a) -> f (URec Char a) # mapM :: Monad m => (a -> m b) -> URec Char a -> m (URec Char b) # sequence :: Monad m => URec Char (m a) -> m (URec Char a) #
Eq (URec Char p)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods (==) :: URec Char p -> URec Char p -> Bool # (/=) :: URec Char p -> URec Char p -> Bool #
Ord (URec Char p)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods compare :: URec Char p -> URec Char p -> Ordering # (<) :: URec Char p -> URec Char p -> Bool # (<=) :: URec Char p -> URec Char p -> Bool # (>) :: URec Char p -> URec Char p -> Bool # (>=) :: URec Char p -> URec Char p -> Bool # max :: URec Char p -> URec Char p -> URec Char p # min :: URec Char p -> URec Char p -> URec Char p #
Show (URec Char p)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods showsPrec :: Int -> URec Char p -> ShowS # show :: URec Char p -> String # showList :: [URec Char p] -> ShowS #
Generic (URec Char p)
Instance details Defined in GHC.Generics Associated Types type Rep (URec Char p) :: Type -> Type # Methods from :: URec Char p -> Rep (URec Char p) x # to :: Rep (URec Char p) x -> URec Char p #
type PrimSize Char
Instance details Defined in Basement.PrimType type PrimSize Char = 4
type Difference Char
Instance details Defined in Basement.Numerical.Subtractive type Difference Char = Int
type NatNumMaxBound Char
Instance details Defined in Basement.Nat type NatNumMaxBound Char = 1114111
newtype Vector Char
Instance details Defined in Data.Vector.Unboxed.Base newtype Vector Char = V_Char (Vector Char)
type Tokens String
Instance details Defined in Text.Megaparsec.Stream type Tokens String = String
type Token String
Instance details Defined in Text.Megaparsec.Stream type Token String = Char
data URec Char (p :: k)	Used for marking occurrences of `Char#` Since: base-4.9.0.0
Instance details Defined in GHC.Generics data URec Char (p :: k) = UChar { uChar# :: Char# }
newtype MVector s Char
Instance details Defined in Data.Vector.Unboxed.Base newtype MVector s Char = MV_Char (MVector s Char)
type Rep1 (URec Char :: k -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics type Rep1 (URec Char :: k -> Type) = D1 (MetaData "URec" "GHC.Generics" "base" False) (C1 (MetaCons "UChar" PrefixI True) (S1 (MetaSel (Just "uChar#") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (UChar :: k -> Type)))
type Rep (URec Char p)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics type Rep (URec Char p) = D1 (MetaData "URec" "GHC.Generics" "base" False) (C1 (MetaCons "UChar" PrefixI True) (S1 (MetaSel (Just "uChar#") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (UChar :: Type -> Type)))

data Maybe a #

The Maybe type encapsulates an optional value. A value of type Maybe a either contains a value of type a (represented as Just a), or it is empty (represented as Nothing). Using Maybe is a good way to deal with errors or exceptional cases without resorting to drastic measures such as error.

The Maybe type is also a monad. It is a simple kind of error monad, where all errors are represented by Nothing. A richer error monad can be built using the Either type.

Constructors

Nothing
Just a

Instances

Monad Maybe	Since: base-2.1
Instance details Defined in GHC.Base Methods (>>=) :: Maybe a -> (a -> Maybe b) -> Maybe b # (>>) :: Maybe a -> Maybe b -> Maybe b # return :: a -> Maybe a # fail :: String -> Maybe a #
Functor Maybe	Since: base-2.1
Instance details Defined in GHC.Base Methods fmap :: (a -> b) -> Maybe a -> Maybe b # (<$) :: a -> Maybe b -> Maybe a #
MonadFail Maybe	Since: base-4.9.0.0
Instance details Defined in Control.Monad.Fail Methods fail :: String -> Maybe a #
Applicative Maybe	Since: base-2.1
Instance details Defined in GHC.Base Methods pure :: a -> Maybe a # (<>) :: Maybe (a -> b) -> Maybe a -> Maybe b # liftA2 :: (a -> b -> c) -> Maybe a -> Maybe b -> Maybe c # (>) :: Maybe a -> Maybe b -> Maybe b # (<*) :: Maybe a -> Maybe b -> Maybe a #
Foldable Maybe	Since: base-2.1
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Maybe m -> m # foldMap :: Monoid m => (a -> m) -> Maybe a -> m # foldr :: (a -> b -> b) -> b -> Maybe a -> b # foldr' :: (a -> b -> b) -> b -> Maybe a -> b # foldl :: (b -> a -> b) -> b -> Maybe a -> b # foldl' :: (b -> a -> b) -> b -> Maybe a -> b # foldr1 :: (a -> a -> a) -> Maybe a -> a # foldl1 :: (a -> a -> a) -> Maybe a -> a # toList :: Maybe a -> [a] # null :: Maybe a -> Bool # length :: Maybe a -> Int # elem :: Eq a => a -> Maybe a -> Bool # maximum :: Ord a => Maybe a -> a # minimum :: Ord a => Maybe a -> a # sum :: Num a => Maybe a -> a # product :: Num a => Maybe a -> a #
Traversable Maybe	Since: base-2.1
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Maybe a -> f (Maybe b) # sequenceA :: Applicative f => Maybe (f a) -> f (Maybe a) # mapM :: Monad m => (a -> m b) -> Maybe a -> m (Maybe b) # sequence :: Monad m => Maybe (m a) -> m (Maybe a) #
MonadPlus Maybe	Since: base-2.1
Instance details Defined in GHC.Base Methods mzero :: Maybe a # mplus :: Maybe a -> Maybe a -> Maybe a #
Alternative Maybe	Since: base-2.1
Instance details Defined in GHC.Base Methods empty :: Maybe a # (<\|>) :: Maybe a -> Maybe a -> Maybe a # some :: Maybe a -> Maybe [a] # many :: Maybe a -> Maybe [a] #
ToJSON1 Maybe
Instance details Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a -> Value) -> ([a] -> Value) -> Maybe a -> Value # liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Maybe a] -> Value # liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Maybe a -> Encoding # liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Maybe a] -> Encoding #
FromJSON1 Maybe
Instance details Defined in Data.Aeson.Types.FromJSON Methods liftParseJSON :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser (Maybe a) # liftParseJSONList :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser [Maybe a] #
Eq1 Maybe	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Classes Methods liftEq :: (a -> b -> Bool) -> Maybe a -> Maybe b -> Bool #
Ord1 Maybe	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Classes Methods liftCompare :: (a -> b -> Ordering) -> Maybe a -> Maybe b -> Ordering #
Read1 Maybe	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Classes Methods liftReadsPrec :: (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (Maybe a) # liftReadList :: (Int -> ReadS a) -> ReadS [a] -> ReadS [Maybe a] # liftReadPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec (Maybe a) # liftReadListPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec [Maybe a] #
Show1 Maybe	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Classes Methods liftShowsPrec :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> Int -> Maybe a -> ShowS # liftShowList :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> [Maybe a] -> ShowS #
MonadFailure Maybe
Instance details Defined in Basement.Monad Associated Types type Failure Maybe :: Type # Methods mFail :: Failure Maybe -> Maybe () #
NFData1 Maybe	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Maybe a -> () #
Hashable1 Maybe
Instance details Defined in Data.Hashable.Class Methods liftHashWithSalt :: (Int -> a -> Int) -> Int -> Maybe a -> Int #
FromValue ParsePackageConfig
Instance details Defined in Hpack.Config Methods fromValue :: Value -> Parser ParsePackageConfig #
(Selector s, GToJSON enc arity (K1 i (Maybe a) :: Type -> Type), KeyValuePair enc pairs, Monoid pairs) => RecordToPairs enc pairs arity (S1 s (K1 i (Maybe a) :: Type -> Type))
Instance details Defined in Data.Aeson.Types.ToJSON Methods recordToPairs :: Options -> ToArgs enc arity a0 -> S1 s (K1 i (Maybe a)) a0 -> pairs
(Selector s, FromJSON a) => FromRecord arity (S1 s (K1 i (Maybe a) :: Type -> Type))
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseRecord :: Options -> FromArgs arity a0 -> Object -> Parser (S1 s (K1 i (Maybe a)) a0)
Eq a => Eq (Maybe a)	Since: base-2.1
Instance details Defined in GHC.Maybe Methods (==) :: Maybe a -> Maybe a -> Bool # (/=) :: Maybe a -> Maybe a -> Bool #
Data a => Data (Maybe a)	Since: base-4.0.0.0
Instance details Defined in Data.Data Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Maybe a -> c (Maybe a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Maybe a) # toConstr :: Maybe a -> Constr # dataTypeOf :: Maybe a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Maybe a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Maybe a)) # gmapT :: (forall b. Data b => b -> b) -> Maybe a -> Maybe a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Maybe a -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Maybe a -> r # gmapQ :: (forall d. Data d => d -> u) -> Maybe a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Maybe a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Maybe a -> m (Maybe a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Maybe a -> m (Maybe a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Maybe a -> m (Maybe a) #
Ord a => Ord (Maybe a)	Since: base-2.1
Instance details Defined in GHC.Maybe Methods compare :: Maybe a -> Maybe a -> Ordering # (<) :: Maybe a -> Maybe a -> Bool # (<=) :: Maybe a -> Maybe a -> Bool # (>) :: Maybe a -> Maybe a -> Bool # (>=) :: Maybe a -> Maybe a -> Bool # max :: Maybe a -> Maybe a -> Maybe a # min :: Maybe a -> Maybe a -> Maybe a #
Read a => Read (Maybe a)	Since: base-2.1
Instance details Defined in GHC.Read Methods readsPrec :: Int -> ReadS (Maybe a) # readList :: ReadS [Maybe a] # readPrec :: ReadPrec (Maybe a) # readListPrec :: ReadPrec [Maybe a] #
Show a => Show (Maybe a)	Since: base-2.1
Instance details Defined in GHC.Show Methods showsPrec :: Int -> Maybe a -> ShowS # show :: Maybe a -> String # showList :: [Maybe a] -> ShowS #
Generic (Maybe a)
Instance details Defined in GHC.Generics Associated Types type Rep (Maybe a) :: Type -> Type # Methods from :: Maybe a -> Rep (Maybe a) x # to :: Rep (Maybe a) x -> Maybe a #
Semigroup a => Semigroup (Maybe a)	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods (<>) :: Maybe a -> Maybe a -> Maybe a # sconcat :: NonEmpty (Maybe a) -> Maybe a # stimes :: Integral b => b -> Maybe a -> Maybe a #
Semigroup a => Monoid (Maybe a)	Lift a semigroup into `Maybe` forming a `Monoid` according to http://en.wikipedia.org/wiki/Monoid: "Any semigroup `S` may be turned into a monoid simply by adjoining an element `e` not in `S` and defining `ee = e` and `es = s = se` for all `s ∈ S`." Since 4.11.0: constraint on inner `a` value generalised from `Monoid` to `Semigroup`. Since: base-2.1*
Instance details Defined in GHC.Base Methods mempty :: Maybe a # mappend :: Maybe a -> Maybe a -> Maybe a # mconcat :: [Maybe a] -> Maybe a #
Lift a => Lift (Maybe a)
Instance details Defined in Language.Haskell.TH.Syntax Methods lift :: Maybe a -> Q Exp #
NFData a => NFData (Maybe a)
Instance details Defined in Control.DeepSeq Methods rnf :: Maybe a -> () #
Hashable a => Hashable (Maybe a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Maybe a -> Int # hash :: Maybe a -> Int #
ToJSON a => ToJSON (Maybe a)
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: Maybe a -> Value # toEncoding :: Maybe a -> Encoding # toJSONList :: [Maybe a] -> Value # toEncodingList :: [Maybe a] -> Encoding #
FromJSON a => FromJSON (Maybe a)
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser (Maybe a) # parseJSONList :: Value -> Parser [Maybe a] #
SingKind a => SingKind (Maybe a)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Associated Types type DemoteRep (Maybe a) :: Type Methods fromSing :: Sing a0 -> DemoteRep (Maybe a)
FromValue a => FromValue (ParseCommonOptions a)
Instance details Defined in Hpack.Config Methods fromValue :: Value -> Parser (ParseCommonOptions a) #
FromValue a => FromValue (ParseConditionalSection a)
Instance details Defined in Hpack.Config Methods fromValue :: Value -> Parser (ParseConditionalSection a) #
FromValue a => FromValue (ParseThenElse a)
Instance details Defined in Hpack.Config Methods fromValue :: Value -> Parser (ParseThenElse a) #
Generic1 Maybe
Instance details Defined in GHC.Generics Associated Types type Rep1 Maybe :: k -> Type # Methods from1 :: Maybe a -> Rep1 Maybe a # to1 :: Rep1 Maybe a -> Maybe a #
SingI (Nothing :: Maybe a)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods sing :: Sing Nothing
SingI a2 => SingI (Just a2 :: Maybe a1)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods sing :: Sing (Just a2)
type Failure Maybe
Instance details Defined in Basement.Monad type Failure Maybe = ()
type Rep (Maybe a)	Since: base-4.6.0.0
Instance details Defined in GHC.Generics type Rep (Maybe a) = D1 (MetaData "Maybe" "GHC.Maybe" "base" False) (C1 (MetaCons "Nothing" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "Just" PrefixI False) (S1 (MetaSel (Nothing :: Maybe Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 a)))
data Sing (b :: Maybe a)
Instance details Defined in GHC.Generics data Sing (b :: Maybe a) where SNothing :: forall a (b :: Maybe a). Sing (Nothing :: Maybe a) SJust :: forall a (b :: Maybe a) (a1 :: a). Sing a1 -> Sing (Just a1)
type DemoteRep (Maybe a)
Instance details Defined in GHC.Generics type DemoteRep (Maybe a) = Maybe (DemoteRep a)
type Rep1 Maybe	Since: base-4.6.0.0
Instance details Defined in GHC.Generics type Rep1 Maybe = D1 (MetaData "Maybe" "GHC.Maybe" "base" False) (C1 (MetaCons "Nothing" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "Just" PrefixI False) (S1 (MetaSel (Nothing :: Maybe Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))

type Type = Type #

The kind of types with values. For example Int :: Type.

data Constraint #

The kind of constraints, like Show a

newtype Last a #

Use Option (Last a) to get the behavior of Last from Data.Monoid

Constructors

Last
Fields getLast :: a

Instances

Monad Last	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (>>=) :: Last a -> (a -> Last b) -> Last b # (>>) :: Last a -> Last b -> Last b # return :: a -> Last a # fail :: String -> Last a #
Functor Last	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fmap :: (a -> b) -> Last a -> Last b # (<$) :: a -> Last b -> Last a #
MonadFix Last	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mfix :: (a -> Last a) -> Last a #
Applicative Last	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods pure :: a -> Last a # (<>) :: Last (a -> b) -> Last a -> Last b # liftA2 :: (a -> b -> c) -> Last a -> Last b -> Last c # (>) :: Last a -> Last b -> Last b # (<*) :: Last a -> Last b -> Last a #
Foldable Last	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fold :: Monoid m => Last m -> m # foldMap :: Monoid m => (a -> m) -> Last a -> m # foldr :: (a -> b -> b) -> b -> Last a -> b # foldr' :: (a -> b -> b) -> b -> Last a -> b # foldl :: (b -> a -> b) -> b -> Last a -> b # foldl' :: (b -> a -> b) -> b -> Last a -> b # foldr1 :: (a -> a -> a) -> Last a -> a # foldl1 :: (a -> a -> a) -> Last a -> a # toList :: Last a -> [a] # null :: Last a -> Bool # length :: Last a -> Int # elem :: Eq a => a -> Last a -> Bool # maximum :: Ord a => Last a -> a # minimum :: Ord a => Last a -> a # sum :: Num a => Last a -> a # product :: Num a => Last a -> a #
Traversable Last	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods traverse :: Applicative f => (a -> f b) -> Last a -> f (Last b) # sequenceA :: Applicative f => Last (f a) -> f (Last a) # mapM :: Monad m => (a -> m b) -> Last a -> m (Last b) # sequence :: Monad m => Last (m a) -> m (Last a) #
ToJSON1 Last
Instance details Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a -> Value) -> ([a] -> Value) -> Last a -> Value # liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Last a] -> Value # liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Last a -> Encoding # liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Last a] -> Encoding #
FromJSON1 Last
Instance details Defined in Data.Aeson.Types.FromJSON Methods liftParseJSON :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser (Last a) # liftParseJSONList :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser [Last a] #
NFData1 Last	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Last a -> () #
Bounded a => Bounded (Last a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods minBound :: Last a # maxBound :: Last a #
Enum a => Enum (Last a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods succ :: Last a -> Last a # pred :: Last a -> Last a # toEnum :: Int -> Last a # fromEnum :: Last a -> Int # enumFrom :: Last a -> [Last a] # enumFromThen :: Last a -> Last a -> [Last a] # enumFromTo :: Last a -> Last a -> [Last a] # enumFromThenTo :: Last a -> Last a -> Last a -> [Last a] #
Eq a => Eq (Last a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (==) :: Last a -> Last a -> Bool # (/=) :: Last a -> Last a -> Bool #
Data a => Data (Last a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Last a -> c (Last a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Last a) # toConstr :: Last a -> Constr # dataTypeOf :: Last a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Last a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Last a)) # gmapT :: (forall b. Data b => b -> b) -> Last a -> Last a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Last a -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Last a -> r # gmapQ :: (forall d. Data d => d -> u) -> Last a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Last a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Last a -> m (Last a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Last a -> m (Last a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Last a -> m (Last a) #
Ord a => Ord (Last a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods compare :: Last a -> Last a -> Ordering # (<) :: Last a -> Last a -> Bool # (<=) :: Last a -> Last a -> Bool # (>) :: Last a -> Last a -> Bool # (>=) :: Last a -> Last a -> Bool # max :: Last a -> Last a -> Last a # min :: Last a -> Last a -> Last a #
Read a => Read (Last a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods readsPrec :: Int -> ReadS (Last a) # readList :: ReadS [Last a] # readPrec :: ReadPrec (Last a) # readListPrec :: ReadPrec [Last a] #
Show a => Show (Last a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods showsPrec :: Int -> Last a -> ShowS # show :: Last a -> String # showList :: [Last a] -> ShowS #
Generic (Last a)
Instance details Defined in Data.Semigroup Associated Types type Rep (Last a) :: Type -> Type # Methods from :: Last a -> Rep (Last a) x # to :: Rep (Last a) x -> Last a #
Semigroup (Last a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: Last a -> Last a -> Last a # sconcat :: NonEmpty (Last a) -> Last a # stimes :: Integral b => b -> Last a -> Last a #
NFData a => NFData (Last a)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: Last a -> () #
Hashable a => Hashable (Last a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Last a -> Int # hash :: Last a -> Int #
ToJSON a => ToJSON (Last a)
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: Last a -> Value # toEncoding :: Last a -> Encoding # toJSONList :: [Last a] -> Value # toEncodingList :: [Last a] -> Encoding #
FromJSON a => FromJSON (Last a)
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser (Last a) # parseJSONList :: Value -> Parser [Last a] #
Generic1 Last
Instance details Defined in Data.Semigroup Associated Types type Rep1 Last :: k -> Type # Methods from1 :: Last a -> Rep1 Last a # to1 :: Rep1 Last a -> Last a #
type Rep (Last a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep (Last a) = D1 (MetaData "Last" "Data.Semigroup" "base" True) (C1 (MetaCons "Last" PrefixI True) (S1 (MetaSel (Just "getLast") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 a)))
type Rep1 Last	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep1 Last = D1 (MetaData "Last" "Data.Semigroup" "base" True) (C1 (MetaCons "Last" PrefixI True) (S1 (MetaSel (Just "getLast") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))

class NFData a where #

A class of types that can be fully evaluated.

Since: deepseq-1.1.0.0

Minimal complete definition

Nothing

Methods

rnf :: a -> () #

rnf should reduce its argument to normal form (that is, fully evaluate all sub-components), and then return '()'.

`Generic` `NFData` deriving

Starting with GHC 7.2, you can automatically derive instances for types possessing a Generic instance.

Note: Generic1 can be auto-derived starting with GHC 7.4

{-# LANGUAGE DeriveGeneric #-}

import GHC.Generics (Generic, Generic1)
import Control.DeepSeq

data Foo a = Foo a String
             deriving (Eq, Generic, Generic1)

instance NFData a => NFData (Foo a)
instance NFData1 Foo

data Colour = Red | Green | Blue
              deriving Generic

instance NFData Colour

Starting with GHC 7.10, the example above can be written more concisely by enabling the new DeriveAnyClass extension:

{-# LANGUAGE DeriveGeneric, DeriveAnyClass #-}

import GHC.Generics (Generic)
import Control.DeepSeq

data Foo a = Foo a String
             deriving (Eq, Generic, Generic1, NFData, NFData1)

data Colour = Red | Green | Blue
              deriving (Generic, NFData)

Compatibility with previous `deepseq` versions

Prior to version 1.4.0.0, the default implementation of the rnf method was defined as

rnf a = seq a ()

However, starting with deepseq-1.4.0.0, the default implementation is based on DefaultSignatures allowing for more accurate auto-derived NFData instances. If you need the previously used exact default rnf method implementation semantics, use

instance NFData Colour where rnf x = seq x ()

or alternatively

instance NFData Colour where rnf = rwhnf

or

{-# LANGUAGE BangPatterns #-}
instance NFData Colour where rnf !_ = ()

Instances

NFData Bool
Instance details Defined in Control.DeepSeq Methods rnf :: Bool -> () #
NFData Char
Instance details Defined in Control.DeepSeq Methods rnf :: Char -> () #
NFData Double
Instance details Defined in Control.DeepSeq Methods rnf :: Double -> () #
NFData Float
Instance details Defined in Control.DeepSeq Methods rnf :: Float -> () #
NFData Int
Instance details Defined in Control.DeepSeq Methods rnf :: Int -> () #
NFData Int8
Instance details Defined in Control.DeepSeq Methods rnf :: Int8 -> () #
NFData Int16
Instance details Defined in Control.DeepSeq Methods rnf :: Int16 -> () #
NFData Int32
Instance details Defined in Control.DeepSeq Methods rnf :: Int32 -> () #
NFData Int64
Instance details Defined in Control.DeepSeq Methods rnf :: Int64 -> () #
NFData Integer
Instance details Defined in Control.DeepSeq Methods rnf :: Integer -> () #
NFData Natural	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Natural -> () #
NFData Ordering
Instance details Defined in Control.DeepSeq Methods rnf :: Ordering -> () #
NFData Word
Instance details Defined in Control.DeepSeq Methods rnf :: Word -> () #
NFData Word8
Instance details Defined in Control.DeepSeq Methods rnf :: Word8 -> () #
NFData Word16
Instance details Defined in Control.DeepSeq Methods rnf :: Word16 -> () #
NFData Word32
Instance details Defined in Control.DeepSeq Methods rnf :: Word32 -> () #
NFData Word64
Instance details Defined in Control.DeepSeq Methods rnf :: Word64 -> () #
NFData CallStack	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: CallStack -> () #
NFData ()
Instance details Defined in Control.DeepSeq Methods rnf :: () -> () #
NFData TyCon	NOTE: Prior to `deepseq-1.4.4.0` this instance was only defined for `base-4.8.0.0` and later. Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: TyCon -> () #
NFData Doc
Instance details Defined in Text.PrettyPrint.HughesPJ Methods rnf :: Doc -> () #
NFData ShortTextLst
Instance details Defined in Distribution.ModuleName Methods rnf :: ShortTextLst -> () #
NFData Version	Since: deepseq-1.3.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Version -> () #
NFData ByteString
Instance details Defined in Data.ByteString.Lazy.Internal Methods rnf :: ByteString -> () #
NFData ShortByteString
Instance details Defined in Data.ByteString.Short.Internal Methods rnf :: ShortByteString -> () #
NFData ByteString
Instance details Defined in Data.ByteString.Internal Methods rnf :: ByteString -> () #
NFData LegacyExeDependency
Instance details Defined in Distribution.Types.LegacyExeDependency Methods rnf :: LegacyExeDependency -> () #
NFData MungedPackageId
Instance details Defined in Distribution.Types.MungedPackageId Methods rnf :: MungedPackageId -> () #
NFData MungedPackageName
Instance details Defined in Distribution.Types.MungedPackageName Methods rnf :: MungedPackageName -> () #
NFData Dependency
Instance details Defined in Distribution.Types.Dependency Methods rnf :: Dependency -> () #
NFData ExeDependency
Instance details Defined in Distribution.Types.ExeDependency Methods rnf :: ExeDependency -> () #
NFData Module
Instance details Defined in Distribution.Types.Module Methods rnf :: Module -> () #
NFData UnitId
Instance details Defined in Distribution.Types.UnitId Methods rnf :: UnitId -> () #
NFData DefUnitId
Instance details Defined in Distribution.Types.UnitId Methods rnf :: DefUnitId -> () #
NFData PackageIdentifier
Instance details Defined in Distribution.Types.PackageId Methods rnf :: PackageIdentifier -> () #
NFData UnqualComponentName
Instance details Defined in Distribution.Types.UnqualComponentName Methods rnf :: UnqualComponentName -> () #
NFData PackageName
Instance details Defined in Distribution.Types.PackageName Methods rnf :: PackageName -> () #
NFData CompilerFlavor
Instance details Defined in Distribution.Compiler Methods rnf :: CompilerFlavor -> () #
NFData CompilerId
Instance details Defined in Distribution.Compiler Methods rnf :: CompilerId -> () #
NFData Language
Instance details Defined in Language.Haskell.Extension Methods rnf :: Language -> () #
NFData Extension
Instance details Defined in Language.Haskell.Extension Methods rnf :: Extension -> () #
NFData KnownExtension
Instance details Defined in Language.Haskell.Extension Methods rnf :: KnownExtension -> () #
NFData License
Instance details Defined in Distribution.License Methods rnf :: License -> () #
NFData ModuleName
Instance details Defined in Distribution.ModuleName Methods rnf :: ModuleName -> () #
NFData License
Instance details Defined in Distribution.SPDX.License Methods rnf :: License -> () #
NFData LicenseExpression
Instance details Defined in Distribution.SPDX.LicenseExpression Methods rnf :: LicenseExpression -> () #
NFData SimpleLicenseExpression
Instance details Defined in Distribution.SPDX.LicenseExpression Methods rnf :: SimpleLicenseExpression -> () #
NFData LicenseExceptionId
Instance details Defined in Distribution.SPDX.LicenseExceptionId Methods rnf :: LicenseExceptionId -> () #
NFData LicenseId
Instance details Defined in Distribution.SPDX.LicenseId Methods rnf :: LicenseId -> () #
NFData LicenseRef
Instance details Defined in Distribution.SPDX.LicenseReference Methods rnf :: LicenseRef -> () #
NFData AbiHash
Instance details Defined in Distribution.Types.AbiHash Methods rnf :: AbiHash -> () #
NFData ComponentId
Instance details Defined in Distribution.Types.ComponentId Methods rnf :: ComponentId -> () #
NFData PkgconfigName
Instance details Defined in Distribution.Types.PkgconfigName Methods rnf :: PkgconfigName -> () #
NFData VersionRange
Instance details Defined in Distribution.Types.VersionRange Methods rnf :: VersionRange -> () #
NFData Version
Instance details Defined in Distribution.Types.Version Methods rnf :: Version -> () #
NFData ShortText
Instance details Defined in Distribution.Utils.ShortText Methods rnf :: ShortText -> () #
NFData PError
Instance details Defined in Distribution.Parsec.Common Methods rnf :: PError -> () #
NFData PWarnType
Instance details Defined in Distribution.Parsec.Common Methods rnf :: PWarnType -> () #
NFData PWarning
Instance details Defined in Distribution.Parsec.Common Methods rnf :: PWarning -> () #
NFData Position
Instance details Defined in Distribution.Parsec.Common Methods rnf :: Position -> () #
NFData Any	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Any -> () #
NFData All	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: All -> () #
NFData Scientific
Instance details Defined in Data.Scientific Methods rnf :: Scientific -> () #
NFData JSONPathElement
Instance details Defined in Data.Aeson.Types.Internal Methods rnf :: JSONPathElement -> () #
NFData Value
Instance details Defined in Data.Aeson.Types.Internal Methods rnf :: Value -> () #
NFData ThreadId	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: ThreadId -> () #
NFData Void	Defined as `rnf = absurd`. Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Void -> () #
NFData Unique	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Unique -> () #
NFData ExitCode	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: ExitCode -> () #
NFData MaskingState	Since: deepseq-1.4.4.0
Instance details Defined in Control.DeepSeq Methods rnf :: MaskingState -> () #
NFData TypeRep	NOTE: Prior to `deepseq-1.4.4.0` this instance was only defined for `base-4.8.0.0` and later. Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: TypeRep -> () #
NFData CChar	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CChar -> () #
NFData CSChar	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CSChar -> () #
NFData CUChar	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CUChar -> () #
NFData CShort	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CShort -> () #
NFData CUShort	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CUShort -> () #
NFData CInt	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CInt -> () #
NFData CUInt	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CUInt -> () #
NFData CLong	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CLong -> () #
NFData CULong	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CULong -> () #
NFData CLLong	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CLLong -> () #
NFData CULLong	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CULLong -> () #
NFData CBool	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods rnf :: CBool -> () #
NFData CFloat	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CFloat -> () #
NFData CDouble	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CDouble -> () #
NFData CPtrdiff	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CPtrdiff -> () #
NFData CSize	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CSize -> () #
NFData CWchar	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CWchar -> () #
NFData CSigAtomic	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CSigAtomic -> () #
NFData CClock	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CClock -> () #
NFData CTime	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CTime -> () #
NFData CUSeconds	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CUSeconds -> () #
NFData CSUSeconds	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CSUSeconds -> () #
NFData CFile	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CFile -> () #
NFData CFpos	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CFpos -> () #
NFData CJmpBuf	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CJmpBuf -> () #
NFData CIntPtr	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CIntPtr -> () #
NFData CUIntPtr	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CUIntPtr -> () #
NFData CIntMax	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CIntMax -> () #
NFData CUIntMax	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: CUIntMax -> () #
NFData Fingerprint	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Fingerprint -> () #
NFData SrcLoc	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: SrcLoc -> () #
NFData IntSet
Instance details Defined in Data.IntSet.Internal Methods rnf :: IntSet -> () #
NFData SharedSecret
Instance details Defined in Crypto.ECC Methods rnf :: SharedSecret -> () #
NFData URI
Instance details Defined in Network.URI Methods rnf :: URI -> () #
NFData Pos
Instance details Defined in Text.Megaparsec.Pos Methods rnf :: Pos -> () #
NFData InvalidPosException
Instance details Defined in Text.Megaparsec.Pos Methods rnf :: InvalidPosException -> () #
NFData SourcePos
Instance details Defined in Text.Megaparsec.Pos Methods rnf :: SourcePos -> () #
NFData URIAuth
Instance details Defined in Network.URI Methods rnf :: URIAuth -> () #
NFData TextDetails
Instance details Defined in Text.PrettyPrint.Annotated.HughesPJ Methods rnf :: TextDetails -> () #
NFData ZonedTime
Instance details Defined in Data.Time.LocalTime.Internal.ZonedTime Methods rnf :: ZonedTime -> () #
NFData LocalTime
Instance details Defined in Data.Time.LocalTime.Internal.LocalTime Methods rnf :: LocalTime -> () #
NFData UUID
Instance details Defined in Data.UUID.Types.Internal Methods rnf :: UUID -> () #
NFData ChallengeError Source #
Instance details Defined in AOC2018.Types Methods rnf :: ChallengeError -> () #
NFData a => NFData [a]
Instance details Defined in Control.DeepSeq Methods rnf :: [a] -> () #
NFData a => NFData (Maybe a)
Instance details Defined in Control.DeepSeq Methods rnf :: Maybe a -> () #
NFData a => NFData (Ratio a)
Instance details Defined in Control.DeepSeq Methods rnf :: Ratio a -> () #
NFData (Ptr a)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: Ptr a -> () #
NFData (FunPtr a)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: FunPtr a -> () #
NFData a => NFData (Last a)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: Last a -> () #
NFData a => NFData (SCC a)
Instance details Defined in Data.Graph Methods rnf :: SCC a -> () #
NFData a => NFData (Set a)
Instance details Defined in Data.Set.Internal Methods rnf :: Set a -> () #
NFData a => NFData (Identity a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Identity a -> () #
NFData a => NFData (ZipList a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: ZipList a -> () #
NFData a => NFData (IResult a)
Instance details Defined in Data.Aeson.Types.Internal Methods rnf :: IResult a -> () #
NFData a => NFData (Result a)
Instance details Defined in Data.Aeson.Types.Internal Methods rnf :: Result a -> () #
NFData a => NFData (Complex a)
Instance details Defined in Control.DeepSeq Methods rnf :: Complex a -> () #
NFData (Fixed a)	Since: deepseq-1.3.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Fixed a -> () #
NFData a => NFData (Min a)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: Min a -> () #
NFData a => NFData (Max a)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: Max a -> () #
NFData a => NFData (First a)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: First a -> () #
NFData m => NFData (WrappedMonoid m)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: WrappedMonoid m -> () #
NFData a => NFData (Option a)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: Option a -> () #
NFData (StableName a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: StableName a -> () #
NFData (IORef a)	NOTE: Only strict in the reference and not the referenced value. Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: IORef a -> () #
NFData a => NFData (First a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: First a -> () #
NFData a => NFData (Last a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Last a -> () #
NFData a => NFData (Dual a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Dual a -> () #
NFData a => NFData (Sum a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Sum a -> () #
NFData a => NFData (Product a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Product a -> () #
NFData a => NFData (Down a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Down a -> () #
NFData (MVar a)	NOTE: Only strict in the reference and not the referenced value. Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: MVar a -> () #
NFData a => NFData (NonEmpty a)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: NonEmpty a -> () #
NFData a => NFData (IntMap a)
Instance details Defined in Data.IntMap.Internal Methods rnf :: IntMap a -> () #
NFData a => NFData (Tree a)
Instance details Defined in Data.Tree Methods rnf :: Tree a -> () #
NFData a => NFData (Seq a)
Instance details Defined in Data.Sequence.Internal Methods rnf :: Seq a -> () #
NFData a => NFData (FingerTree a)
Instance details Defined in Data.Sequence.Internal Methods rnf :: FingerTree a -> () #
NFData a => NFData (Digit a)
Instance details Defined in Data.Sequence.Internal Methods rnf :: Digit a -> () #
NFData a => NFData (Node a)
Instance details Defined in Data.Sequence.Internal Methods rnf :: Node a -> () #
NFData a => NFData (Elem a)
Instance details Defined in Data.Sequence.Internal Methods rnf :: Elem a -> () #
NFData (Context a)
Instance details Defined in Crypto.Hash.Types Methods rnf :: Context a -> () #
NFData (Digest a)
Instance details Defined in Crypto.Hash.Types Methods rnf :: Digest a -> () #
NFData a => NFData (DList a)
Instance details Defined in Data.DList Methods rnf :: DList a -> () #
NFData (Finite n)
Instance details Defined in Data.Finite.Internal Methods rnf :: Finite n -> () #
NFData a => NFData (Hashed a)
Instance details Defined in Data.Hashable.Class Methods rnf :: Hashed a -> () #
NFData (Vector a)
Instance details Defined in Data.Vector.Primitive Methods rnf :: Vector a -> () #
NFData (Vector a)
Instance details Defined in Data.Vector.Storable Methods rnf :: Vector a -> () #
NFData (Vector a)
Instance details Defined in Data.Vector.Unboxed.Base Methods rnf :: Vector a -> () #
NFData a => NFData (HashSet a)
Instance details Defined in Data.HashSet Methods rnf :: HashSet a -> () #
NFData a => NFData (Vector a)
Instance details Defined in Data.Vector Methods rnf :: Vector a -> () #
NFData t => NFData (ErrorItem t)
Instance details Defined in Text.Megaparsec.Error Methods rnf :: ErrorItem t -> () #
NFData a => NFData (ErrorFancy a)
Instance details Defined in Text.Megaparsec.Error Methods rnf :: ErrorFancy a -> () #
NFData s => NFData (State s)
Instance details Defined in Text.Megaparsec.State Methods rnf :: State s -> () #
NFData s => NFData (PosState s)
Instance details Defined in Text.Megaparsec.State Methods rnf :: PosState s -> () #
NFData a => NFData (Doc a)
Instance details Defined in Text.PrettyPrint.Annotated.HughesPJ Methods rnf :: Doc a -> () #
NFData a => NFData (AnnotDetails a)
Instance details Defined in Text.PrettyPrint.Annotated.HughesPJ Methods rnf :: AnnotDetails a -> () #
NFData (a -> b)	This instance is for convenience and consistency with `seq`. This assumes that WHNF is equivalent to NF for functions. Since: deepseq-1.3.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: (a -> b) -> () #
(NFData a, NFData b) => NFData (Either a b)
Instance details Defined in Control.DeepSeq Methods rnf :: Either a b -> () #
(NFData a, NFData b) => NFData (a, b)
Instance details Defined in Control.DeepSeq Methods rnf :: (a, b) -> () #
(NFData k, NFData a) => NFData (Map k a)
Instance details Defined in Data.Map.Internal Methods rnf :: Map k a -> () #
(NFData k, NFData v) => NFData (HashMap k v)
Instance details Defined in Data.HashMap.Base Methods rnf :: HashMap k v -> () #
(NFData a, NFData b) => NFData (Array a b)
Instance details Defined in Control.DeepSeq Methods rnf :: Array a b -> () #
(NFData i, NFData r) => NFData (IResult i r)
Instance details Defined in Data.Attoparsec.Internal.Types Methods rnf :: IResult i r -> () #
(NFData a, NFData b) => NFData (Arg a b)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: Arg a b -> () #
NFData (Proxy a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Proxy a -> () #
NFData (STRef s a)	NOTE: Only strict in the reference and not the referenced value. Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: STRef s a -> () #
(NFData (Token s), NFData e) => NFData (ParseError s e)
Instance details Defined in Text.Megaparsec.Error Methods rnf :: ParseError s e -> () #
(NFData s, NFData (Token s), NFData e) => NFData (ParseErrorBundle s e)
Instance details Defined in Text.Megaparsec.Error Methods rnf :: ParseErrorBundle s e -> () #
(NFData k, NFData v) => NFData (Leaf k v)
Instance details Defined in Data.HashMap.Base Methods rnf :: Leaf k v -> () #
NFData (MVector s a)
Instance details Defined in Data.Vector.Unboxed.Base Methods rnf :: MVector s a -> () #
(NFData a1, NFData a2, NFData a3) => NFData (a1, a2, a3)
Instance details Defined in Control.DeepSeq Methods rnf :: (a1, a2, a3) -> () #
NFData a => NFData (Const a b)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Const a b -> () #
NFData (a :~: b)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods rnf :: (a :~: b) -> () #
NFData b => NFData (Tagged s b)
Instance details Defined in Data.Tagged Methods rnf :: Tagged s b -> () #
(NFData a1, NFData a2, NFData a3, NFData a4) => NFData (a1, a2, a3, a4)
Instance details Defined in Control.DeepSeq Methods rnf :: (a1, a2, a3, a4) -> () #
(NFData1 f, NFData1 g, NFData a) => NFData (Product f g a)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods rnf :: Product f g a -> () #
(NFData1 f, NFData1 g, NFData a) => NFData (Sum f g a)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods rnf :: Sum f g a -> () #
NFData (a :~~: b)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods rnf :: (a :~~: b) -> () #
(NFData a1, NFData a2, NFData a3, NFData a4, NFData a5) => NFData (a1, a2, a3, a4, a5)
Instance details Defined in Control.DeepSeq Methods rnf :: (a1, a2, a3, a4, a5) -> () #
(NFData1 f, NFData1 g, NFData a) => NFData (Compose f g a)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods rnf :: Compose f g a -> () #
(NFData a1, NFData a2, NFData a3, NFData a4, NFData a5, NFData a6) => NFData (a1, a2, a3, a4, a5, a6)
Instance details Defined in Control.DeepSeq Methods rnf :: (a1, a2, a3, a4, a5, a6) -> () #
(NFData a1, NFData a2, NFData a3, NFData a4, NFData a5, NFData a6, NFData a7) => NFData (a1, a2, a3, a4, a5, a6, a7)
Instance details Defined in Control.DeepSeq Methods rnf :: (a1, a2, a3, a4, a5, a6, a7) -> () #
(NFData a1, NFData a2, NFData a3, NFData a4, NFData a5, NFData a6, NFData a7, NFData a8) => NFData (a1, a2, a3, a4, a5, a6, a7, a8)
Instance details Defined in Control.DeepSeq Methods rnf :: (a1, a2, a3, a4, a5, a6, a7, a8) -> () #
(NFData a1, NFData a2, NFData a3, NFData a4, NFData a5, NFData a6, NFData a7, NFData a8, NFData a9) => NFData (a1, a2, a3, a4, a5, a6, a7, a8, a9)
Instance details Defined in Control.DeepSeq Methods rnf :: (a1, a2, a3, a4, a5, a6, a7, a8, a9) -> () #

data Map k a #

A Map from keys k to values a.

Instances

Eq2 Map	Since: containers-0.5.9
Instance details Defined in Data.Map.Internal Methods liftEq2 :: (a -> b -> Bool) -> (c -> d -> Bool) -> Map a c -> Map b d -> Bool #
Ord2 Map	Since: containers-0.5.9
Instance details Defined in Data.Map.Internal Methods liftCompare2 :: (a -> b -> Ordering) -> (c -> d -> Ordering) -> Map a c -> Map b d -> Ordering #
Show2 Map	Since: containers-0.5.9
Instance details Defined in Data.Map.Internal Methods liftShowsPrec2 :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> (Int -> b -> ShowS) -> ([b] -> ShowS) -> Int -> Map a b -> ShowS # liftShowList2 :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> (Int -> b -> ShowS) -> ([b] -> ShowS) -> [Map a b] -> ShowS #
Functor (Map k)
Instance details Defined in Data.Map.Internal Methods fmap :: (a -> b) -> Map k a -> Map k b # (<$) :: a -> Map k b -> Map k a #
Foldable (Map k)
Instance details Defined in Data.Map.Internal Methods fold :: Monoid m => Map k m -> m # foldMap :: Monoid m => (a -> m) -> Map k a -> m # foldr :: (a -> b -> b) -> b -> Map k a -> b # foldr' :: (a -> b -> b) -> b -> Map k a -> b # foldl :: (b -> a -> b) -> b -> Map k a -> b # foldl' :: (b -> a -> b) -> b -> Map k a -> b # foldr1 :: (a -> a -> a) -> Map k a -> a # foldl1 :: (a -> a -> a) -> Map k a -> a # toList :: Map k a -> [a] # null :: Map k a -> Bool # length :: Map k a -> Int # elem :: Eq a => a -> Map k a -> Bool # maximum :: Ord a => Map k a -> a # minimum :: Ord a => Map k a -> a # sum :: Num a => Map k a -> a # product :: Num a => Map k a -> a #
Traversable (Map k)
Instance details Defined in Data.Map.Internal Methods traverse :: Applicative f => (a -> f b) -> Map k a -> f (Map k b) # sequenceA :: Applicative f => Map k (f a) -> f (Map k a) # mapM :: Monad m => (a -> m b) -> Map k a -> m (Map k b) # sequence :: Monad m => Map k (m a) -> m (Map k a) #
ToJSONKey k => ToJSON1 (Map k)
Instance details Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a -> Value) -> ([a] -> Value) -> Map k a -> Value # liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Map k a] -> Value # liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Map k a -> Encoding # liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Map k a] -> Encoding #
(FromJSONKey k, Ord k) => FromJSON1 (Map k)
Instance details Defined in Data.Aeson.Types.FromJSON Methods liftParseJSON :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser (Map k a) # liftParseJSONList :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser [Map k a] #
Eq k => Eq1 (Map k)	Since: containers-0.5.9
Instance details Defined in Data.Map.Internal Methods liftEq :: (a -> b -> Bool) -> Map k a -> Map k b -> Bool #
Ord k => Ord1 (Map k)	Since: containers-0.5.9
Instance details Defined in Data.Map.Internal Methods liftCompare :: (a -> b -> Ordering) -> Map k a -> Map k b -> Ordering #
(Ord k, Read k) => Read1 (Map k)	Since: containers-0.5.9
Instance details Defined in Data.Map.Internal Methods liftReadsPrec :: (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (Map k a) # liftReadList :: (Int -> ReadS a) -> ReadS [a] -> ReadS [Map k a] # liftReadPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec (Map k a) # liftReadListPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec [Map k a] #
Show k => Show1 (Map k)	Since: containers-0.5.9
Instance details Defined in Data.Map.Internal Methods liftShowsPrec :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> Int -> Map k a -> ShowS # liftShowList :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> [Map k a] -> ShowS #
Ord k => IsList (Map k v)	Since: containers-0.5.6.2
Instance details Defined in Data.Map.Internal Associated Types type Item (Map k v) :: Type # Methods fromList :: [Item (Map k v)] -> Map k v # fromListN :: Int -> [Item (Map k v)] -> Map k v # toList :: Map k v -> [Item (Map k v)] #
(Eq k, Eq a) => Eq (Map k a)
Instance details Defined in Data.Map.Internal Methods (==) :: Map k a -> Map k a -> Bool # (/=) :: Map k a -> Map k a -> Bool #
(Data k, Data a, Ord k) => Data (Map k a)
Instance details Defined in Data.Map.Internal Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Map k a -> c (Map k a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Map k a) # toConstr :: Map k a -> Constr # dataTypeOf :: Map k a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Map k a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Map k a)) # gmapT :: (forall b. Data b => b -> b) -> Map k a -> Map k a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Map k a -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Map k a -> r # gmapQ :: (forall d. Data d => d -> u) -> Map k a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Map k a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Map k a -> m (Map k a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Map k a -> m (Map k a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Map k a -> m (Map k a) #
(Ord k, Ord v) => Ord (Map k v)
Instance details Defined in Data.Map.Internal Methods compare :: Map k v -> Map k v -> Ordering # (<) :: Map k v -> Map k v -> Bool # (<=) :: Map k v -> Map k v -> Bool # (>) :: Map k v -> Map k v -> Bool # (>=) :: Map k v -> Map k v -> Bool # max :: Map k v -> Map k v -> Map k v # min :: Map k v -> Map k v -> Map k v #
(Ord k, Read k, Read e) => Read (Map k e)
Instance details Defined in Data.Map.Internal Methods readsPrec :: Int -> ReadS (Map k e) # readList :: ReadS [Map k e] # readPrec :: ReadPrec (Map k e) # readListPrec :: ReadPrec [Map k e] #
(Show k, Show a) => Show (Map k a)
Instance details Defined in Data.Map.Internal Methods showsPrec :: Int -> Map k a -> ShowS # show :: Map k a -> String # showList :: [Map k a] -> ShowS #
Ord k => Semigroup (Map k v)
Instance details Defined in Data.Map.Internal Methods (<>) :: Map k v -> Map k v -> Map k v # sconcat :: NonEmpty (Map k v) -> Map k v # stimes :: Integral b => b -> Map k v -> Map k v #
Ord k => Monoid (Map k v)
Instance details Defined in Data.Map.Internal Methods mempty :: Map k v # mappend :: Map k v -> Map k v -> Map k v # mconcat :: [Map k v] -> Map k v #
(NFData k, NFData a) => NFData (Map k a)
Instance details Defined in Data.Map.Internal Methods rnf :: Map k a -> () #
(ToJSON v, ToJSONKey k) => ToJSON (Map k v)
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: Map k v -> Value # toEncoding :: Map k v -> Encoding # toJSONList :: [Map k v] -> Value # toEncodingList :: [Map k v] -> Encoding #
(FromJSONKey k, Ord k, FromJSON v) => FromJSON (Map k v)
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser (Map k v) # parseJSONList :: Value -> Parser [Map k v] #
type Item (Map k v)
Instance details Defined in Data.Map.Internal type Item (Map k v) = (k, v)

class (Alternative m, Monad m) => MonadPlus (m :: Type -> Type) where #

Monads that also support choice and failure.

Minimal complete definition

Nothing

Methods

mzero :: m a #

The identity of mplus. It should also satisfy the equations

mzero >>= f  =  mzero
v >> mzero   =  mzero

The default definition is

mzero = empty

mplus :: m a -> m a -> m a #

An associative operation. The default definition is

mplus = (<|>)

Instances

MonadPlus []	Since: base-2.1
Instance details Defined in GHC.Base Methods mzero :: [a] # mplus :: [a] -> [a] -> [a] #
MonadPlus Maybe	Since: base-2.1
Instance details Defined in GHC.Base Methods mzero :: Maybe a # mplus :: Maybe a -> Maybe a -> Maybe a #
MonadPlus IO	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods mzero :: IO a # mplus :: IO a -> IO a -> IO a #
MonadPlus IResult
Instance details Defined in Data.Aeson.Types.Internal Methods mzero :: IResult a # mplus :: IResult a -> IResult a -> IResult a #
MonadPlus Result
Instance details Defined in Data.Aeson.Types.Internal Methods mzero :: Result a # mplus :: Result a -> Result a -> Result a #
MonadPlus Parser
Instance details Defined in Data.Aeson.Types.Internal Methods mzero :: Parser a # mplus :: Parser a -> Parser a -> Parser a #
MonadPlus Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mzero :: Option a # mplus :: Option a -> Option a -> Option a #
MonadPlus ReadP	Since: base-2.1
Instance details Defined in Text.ParserCombinators.ReadP Methods mzero :: ReadP a # mplus :: ReadP a -> ReadP a -> ReadP a #
MonadPlus Seq
Instance details Defined in Data.Sequence.Internal Methods mzero :: Seq a # mplus :: Seq a -> Seq a -> Seq a #
MonadPlus DList
Instance details Defined in Data.DList Methods mzero :: DList a # mplus :: DList a -> DList a -> DList a #
MonadPlus Vector
Instance details Defined in Data.Vector Methods mzero :: Vector a # mplus :: Vector a -> Vector a -> Vector a #
MonadPlus SmallArray
Instance details Defined in Data.Primitive.SmallArray Methods mzero :: SmallArray a # mplus :: SmallArray a -> SmallArray a -> SmallArray a #
MonadPlus Array
Instance details Defined in Data.Primitive.Array Methods mzero :: Array a # mplus :: Array a -> Array a -> Array a #
MonadPlus P	Since: base-2.1
Instance details Defined in Text.ParserCombinators.ReadP Methods mzero :: P a # mplus :: P a -> P a -> P a #
MonadPlus (U1 :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods mzero :: U1 a # mplus :: U1 a -> U1 a -> U1 a #
MonadPlus (Parser i)
Instance details Defined in Data.Attoparsec.Internal.Types Methods mzero :: Parser i a # mplus :: Parser i a -> Parser i a -> Parser i a #
MonadPlus (Proxy :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Proxy Methods mzero :: Proxy a # mplus :: Proxy a -> Proxy a -> Proxy a #
MonadPlus m => MonadPlus (ResourceT m)	Since 1.1.5
Instance details Defined in Control.Monad.Trans.Resource.Internal Methods mzero :: ResourceT m a # mplus :: ResourceT m a -> ResourceT m a -> ResourceT m a #
MonadPlus f => MonadPlus (Rec1 f)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods mzero :: Rec1 f a # mplus :: Rec1 f a -> Rec1 f a -> Rec1 f a #
MonadPlus f => MonadPlus (Ap f)	Since: base-4.12.0.0
Instance details Defined in Data.Monoid Methods mzero :: Ap f a # mplus :: Ap f a -> Ap f a -> Ap f a #
MonadPlus f => MonadPlus (Alt f)	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods mzero :: Alt f a # mplus :: Alt f a -> Alt f a -> Alt f a #
(Monad m, Monoid e) => MonadPlus (ExceptT e m)
Instance details Defined in Control.Monad.Trans.Except Methods mzero :: ExceptT e m a # mplus :: ExceptT e m a -> ExceptT e m a -> ExceptT e m a #
(Monad m, Error e) => MonadPlus (ErrorT e m)
Instance details Defined in Control.Monad.Trans.Error Methods mzero :: ErrorT e m a # mplus :: ErrorT e m a -> ErrorT e m a -> ErrorT e m a #
(MonadPlus f, MonadPlus g) => MonadPlus (f :*: g)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods mzero :: (f :: g) a # mplus :: (f :: g) a -> (f :: g) a -> (f :: g) a #
(MonadPlus f, MonadPlus g) => MonadPlus (Product f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Product Methods mzero :: Product f g a # mplus :: Product f g a -> Product f g a -> Product f g a #
(Ord e, Stream s) => MonadPlus (ParsecT e s m)	`mzero` is a parser that fails without consuming input.
Instance details Defined in Text.Megaparsec.Internal Methods mzero :: ParsecT e s m a # mplus :: ParsecT e s m a -> ParsecT e s m a -> ParsecT e s m a #
MonadPlus f => MonadPlus (M1 i c f)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods mzero :: M1 i c f a # mplus :: M1 i c f a -> M1 i c f a -> M1 i c f a #

class Applicative f => Alternative (f :: Type -> Type) where #

A monoid on applicative functors.

If defined, some and many should be the least solutions of the equations:

```
some v = (:) <$> v <*> many v
```
```
many v = some v <|> pure []
```

Minimal complete definition

empty, (<|>)

Methods

empty :: f a #

The identity of <|>

(<|>) :: f a -> f a -> f a infixl 3 #

An associative binary operation

some :: f a -> f [a] #

One or more.

many :: f a -> f [a] #

Zero or more.

Instances

Alternative []	Since: base-2.1
Instance details Defined in GHC.Base Methods empty :: [a] # (<\|>) :: [a] -> [a] -> [a] # some :: [a] -> [[a]] # many :: [a] -> [[a]] #
Alternative Maybe	Since: base-2.1
Instance details Defined in GHC.Base Methods empty :: Maybe a # (<\|>) :: Maybe a -> Maybe a -> Maybe a # some :: Maybe a -> Maybe [a] # many :: Maybe a -> Maybe [a] #
Alternative IO	Since: base-4.9.0.0
Instance details Defined in GHC.Base Methods empty :: IO a # (<\|>) :: IO a -> IO a -> IO a # some :: IO a -> IO [a] # many :: IO a -> IO [a] #
Alternative ZipList	Since: base-4.11.0.0
Instance details Defined in Control.Applicative Methods empty :: ZipList a # (<\|>) :: ZipList a -> ZipList a -> ZipList a # some :: ZipList a -> ZipList [a] # many :: ZipList a -> ZipList [a] #
Alternative IResult
Instance details Defined in Data.Aeson.Types.Internal Methods empty :: IResult a # (<\|>) :: IResult a -> IResult a -> IResult a # some :: IResult a -> IResult [a] # many :: IResult a -> IResult [a] #
Alternative Result
Instance details Defined in Data.Aeson.Types.Internal Methods empty :: Result a # (<\|>) :: Result a -> Result a -> Result a # some :: Result a -> Result [a] # many :: Result a -> Result [a] #
Alternative Parser
Instance details Defined in Data.Aeson.Types.Internal Methods empty :: Parser a # (<\|>) :: Parser a -> Parser a -> Parser a # some :: Parser a -> Parser [a] # many :: Parser a -> Parser [a] #
Alternative Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods empty :: Option a # (<\|>) :: Option a -> Option a -> Option a # some :: Option a -> Option [a] # many :: Option a -> Option [a] #
Alternative ReadP	Since: base-4.6.0.0
Instance details Defined in Text.ParserCombinators.ReadP Methods empty :: ReadP a # (<\|>) :: ReadP a -> ReadP a -> ReadP a # some :: ReadP a -> ReadP [a] # many :: ReadP a -> ReadP [a] #
Alternative Seq	Since: containers-0.5.4
Instance details Defined in Data.Sequence.Internal Methods empty :: Seq a # (<\|>) :: Seq a -> Seq a -> Seq a # some :: Seq a -> Seq [a] # many :: Seq a -> Seq [a] #
Alternative DList
Instance details Defined in Data.DList Methods empty :: DList a # (<\|>) :: DList a -> DList a -> DList a # some :: DList a -> DList [a] # many :: DList a -> DList [a] #
Alternative Vector
Instance details Defined in Data.Vector Methods empty :: Vector a # (<\|>) :: Vector a -> Vector a -> Vector a # some :: Vector a -> Vector [a] # many :: Vector a -> Vector [a] #
Alternative SmallArray
Instance details Defined in Data.Primitive.SmallArray Methods empty :: SmallArray a # (<\|>) :: SmallArray a -> SmallArray a -> SmallArray a # some :: SmallArray a -> SmallArray [a] # many :: SmallArray a -> SmallArray [a] #
Alternative Array
Instance details Defined in Data.Primitive.Array Methods empty :: Array a # (<\|>) :: Array a -> Array a -> Array a # some :: Array a -> Array [a] # many :: Array a -> Array [a] #
Alternative P	Since: base-4.5.0.0
Instance details Defined in Text.ParserCombinators.ReadP Methods empty :: P a # (<\|>) :: P a -> P a -> P a # some :: P a -> P [a] # many :: P a -> P [a] #
Alternative (U1 :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods empty :: U1 a # (<\|>) :: U1 a -> U1 a -> U1 a # some :: U1 a -> U1 [a] # many :: U1 a -> U1 [a] #
MonadPlus m => Alternative (WrappedMonad m)	Since: base-2.1
Instance details Defined in Control.Applicative Methods empty :: WrappedMonad m a # (<\|>) :: WrappedMonad m a -> WrappedMonad m a -> WrappedMonad m a # some :: WrappedMonad m a -> WrappedMonad m [a] # many :: WrappedMonad m a -> WrappedMonad m [a] #
Alternative (Parser i)
Instance details Defined in Data.Attoparsec.Internal.Types Methods empty :: Parser i a # (<\|>) :: Parser i a -> Parser i a -> Parser i a # some :: Parser i a -> Parser i [a] # many :: Parser i a -> Parser i [a] #
Alternative (Proxy :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Proxy Methods empty :: Proxy a # (<\|>) :: Proxy a -> Proxy a -> Proxy a # some :: Proxy a -> Proxy [a] # many :: Proxy a -> Proxy [a] #
Alternative m => Alternative (ResourceT m)	Since 1.1.5
Instance details Defined in Control.Monad.Trans.Resource.Internal Methods empty :: ResourceT m a # (<\|>) :: ResourceT m a -> ResourceT m a -> ResourceT m a # some :: ResourceT m a -> ResourceT m [a] # many :: ResourceT m a -> ResourceT m [a] #
Alternative f => Alternative (Rec1 f)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods empty :: Rec1 f a # (<\|>) :: Rec1 f a -> Rec1 f a -> Rec1 f a # some :: Rec1 f a -> Rec1 f [a] # many :: Rec1 f a -> Rec1 f [a] #
(ArrowZero a, ArrowPlus a) => Alternative (WrappedArrow a b)	Since: base-2.1
Instance details Defined in Control.Applicative Methods empty :: WrappedArrow a b a0 # (<\|>) :: WrappedArrow a b a0 -> WrappedArrow a b a0 -> WrappedArrow a b a0 # some :: WrappedArrow a b a0 -> WrappedArrow a b [a0] # many :: WrappedArrow a b a0 -> WrappedArrow a b [a0] #
Alternative f => Alternative (Ap f)	Since: base-4.12.0.0
Instance details Defined in Data.Monoid Methods empty :: Ap f a # (<\|>) :: Ap f a -> Ap f a -> Ap f a # some :: Ap f a -> Ap f [a] # many :: Ap f a -> Ap f [a] #
Alternative f => Alternative (Alt f)	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods empty :: Alt f a # (<\|>) :: Alt f a -> Alt f a -> Alt f a # some :: Alt f a -> Alt f [a] # many :: Alt f a -> Alt f [a] #
(Functor m, Monad m, Monoid e) => Alternative (ExceptT e m)
Instance details Defined in Control.Monad.Trans.Except Methods empty :: ExceptT e m a # (<\|>) :: ExceptT e m a -> ExceptT e m a -> ExceptT e m a # some :: ExceptT e m a -> ExceptT e m [a] # many :: ExceptT e m a -> ExceptT e m [a] #
(Functor m, Monad m, Error e) => Alternative (ErrorT e m)
Instance details Defined in Control.Monad.Trans.Error Methods empty :: ErrorT e m a # (<\|>) :: ErrorT e m a -> ErrorT e m a -> ErrorT e m a # some :: ErrorT e m a -> ErrorT e m [a] # many :: ErrorT e m a -> ErrorT e m [a] #
(Alternative f, Alternative g) => Alternative (f :*: g)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods empty :: (f :: g) a # (<\|>) :: (f :: g) a -> (f :: g) a -> (f :: g) a # some :: (f :: g) a -> (f :: g) [a] # many :: (f :: g) a -> (f :: g) [a] #
(Alternative f, Alternative g) => Alternative (Product f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Product Methods empty :: Product f g a # (<\|>) :: Product f g a -> Product f g a -> Product f g a # some :: Product f g a -> Product f g [a] # many :: Product f g a -> Product f g [a] #
(Ord e, Stream s) => Alternative (ParsecT e s m)	`empty` is a parser that fails without consuming input.
Instance details Defined in Text.Megaparsec.Internal Methods empty :: ParsecT e s m a # (<\|>) :: ParsecT e s m a -> ParsecT e s m a -> ParsecT e s m a # some :: ParsecT e s m a -> ParsecT e s m [a] # many :: ParsecT e s m a -> ParsecT e s m [a] #
Alternative f => Alternative (M1 i c f)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods empty :: M1 i c f a # (<\|>) :: M1 i c f a -> M1 i c f a -> M1 i c f a # some :: M1 i c f a -> M1 i c f [a] # many :: M1 i c f a -> M1 i c f [a] #
(Alternative f, Applicative g) => Alternative (f :.: g)	Since: base-4.9.0.0
Instance details Defined in GHC.Generics Methods empty :: (f :.: g) a # (<\|>) :: (f :.: g) a -> (f :.: g) a -> (f :.: g) a # some :: (f :.: g) a -> (f :.: g) [a] # many :: (f :.: g) a -> (f :.: g) [a] #
(Alternative f, Applicative g) => Alternative (Compose f g)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Compose Methods empty :: Compose f g a # (<\|>) :: Compose f g a -> Compose f g a -> Compose f g a # some :: Compose f g a -> Compose f g [a] # many :: Compose f g a -> Compose f g [a] #

(=<<) :: Monad m => (a -> m b) -> m a -> m b infixr 1 #

Same as >>=, but with the arguments interchanged.

when :: Applicative f => Bool -> f () -> f () #

Conditional execution of Applicative expressions. For example,

when debug (putStrLn "Debugging")

will output the string Debugging if the Boolean value debug is True, and otherwise do nothing.

liftM :: Monad m => (a1 -> r) -> m a1 -> m r #

Promote a function to a monad.

liftM2 :: Monad m => (a1 -> a2 -> r) -> m a1 -> m a2 -> m r #

Promote a function to a monad, scanning the monadic arguments from left to right. For example,

liftM2 (+) [0,1] [0,2] = [0,2,1,3]
liftM2 (+) (Just 1) Nothing = Nothing

ap :: Monad m => m (a -> b) -> m a -> m b #

In many situations, the liftM operations can be replaced by uses of ap, which promotes function application.

return f `ap` x1 `ap` ... `ap` xn

is equivalent to

liftMn f x1 x2 ... xn

ord :: Char -> Int #

The fromEnum method restricted to the type Char.

id :: a -> a #

Identity function.

id x = x

const :: a -> b -> a #

const x is a unary function which evaluates to x for all inputs.

>>> const 42 "hello"
42

>>> map (const 42) [0..3]
[42,42,42,42]

(.) :: (b -> c) -> (a -> b) -> a -> c infixr 9 #

Function composition.

flip :: (a -> b -> c) -> b -> a -> c #

flip f takes its (first) two arguments in the reverse order of f.

>>> flip (++) "hello" "world"
"worldhello"

curry :: ((a, b) -> c) -> a -> b -> c #

curry converts an uncurried function to a curried function.

Examples

Expand

>>> curry fst 1 2
1

uncurry :: (a -> b -> c) -> (a, b) -> c #

uncurry converts a curried function to a function on pairs.

Examples

Expand

>>> uncurry (+) (1,2)
3

>>> uncurry ($) (show, 1)
"1"

>>> map (uncurry max) [(1,2), (3,4), (6,8)]
[2,4,8]

maybe :: b -> (a -> b) -> Maybe a -> b #

The maybe function takes a default value, a function, and a Maybe value. If the Maybe value is Nothing, the function returns the default value. Otherwise, it applies the function to the value inside the Just and returns the result.

Examples

Expand

Basic usage:

>>> maybe False odd (Just 3)
True

>>> maybe False odd Nothing
False

Read an integer from a string using readMaybe. If we succeed, return twice the integer; that is, apply (*2) to it. If instead we fail to parse an integer, return 0 by default:

>>> import Text.Read ( readMaybe )
>>> maybe 0 (*2) (readMaybe "5")
10
>>> maybe 0 (*2) (readMaybe "")
0

Apply show to a Maybe Int. If we have Just n, we want to show the underlying Int n. But if we have Nothing, we return the empty string instead of (for example) "Nothing":

>>> maybe "" show (Just 5)
"5"
>>> maybe "" show Nothing
""

isJust :: Maybe a -> Bool #

The isJust function returns True iff its argument is of the form Just _.

Examples

Expand

Basic usage:

>>> isJust (Just 3)
True

>>> isJust (Just ())
True

>>> isJust Nothing
False

Only the outer constructor is taken into consideration:

>>> isJust (Just Nothing)
True

isNothing :: Maybe a -> Bool #

The isNothing function returns True iff its argument is Nothing.

Examples

Expand

Basic usage:

>>> isNothing (Just 3)
False

>>> isNothing (Just ())
False

>>> isNothing Nothing
True

Only the outer constructor is taken into consideration:

>>> isNothing (Just Nothing)
False

fromMaybe :: a -> Maybe a -> a #

The fromMaybe function takes a default value and and Maybe value. If the Maybe is Nothing, it returns the default values; otherwise, it returns the value contained in the Maybe.

Examples

Expand

Basic usage:

>>> fromMaybe "" (Just "Hello, World!")
"Hello, World!"

>>> fromMaybe "" Nothing
""

Read an integer from a string using readMaybe. If we fail to parse an integer, we want to return 0 by default:

>>> import Text.Read ( readMaybe )
>>> fromMaybe 0 (readMaybe "5")
5
>>> fromMaybe 0 (readMaybe "")
0

maybeToList :: Maybe a -> [a] #

The maybeToList function returns an empty list when given Nothing or a singleton list when not given Nothing.

Examples

Expand

Basic usage:

>>> maybeToList (Just 7)
[7]

>>> maybeToList Nothing
[]

One can use maybeToList to avoid pattern matching when combined with a function that (safely) works on lists:

>>> import Text.Read ( readMaybe )
>>> sum $ maybeToList (readMaybe "3")
3
>>> sum $ maybeToList (readMaybe "")
0

listToMaybe :: [a] -> Maybe a #

The listToMaybe function returns Nothing on an empty list or Just a where a is the first element of the list.

Examples

Expand

Basic usage:

>>> listToMaybe []
Nothing

>>> listToMaybe [9]
Just 9

>>> listToMaybe [1,2,3]
Just 1

Composing maybeToList with listToMaybe should be the identity on singleton/empty lists:

>>> maybeToList $ listToMaybe [5]
[5]
>>> maybeToList $ listToMaybe []
[]

But not on lists with more than one element:

>>> maybeToList $ listToMaybe [1,2,3]
[1]

catMaybes :: [Maybe a] -> [a] #

The catMaybes function takes a list of Maybes and returns a list of all the Just values.

Examples

Expand

Basic usage:

>>> catMaybes [Just 1, Nothing, Just 3]
[1,3]

When constructing a list of Maybe values, catMaybes can be used to return all of the "success" results (if the list is the result of a map, then mapMaybe would be more appropriate):

>>> import Text.Read ( readMaybe )
>>> [readMaybe x :: Maybe Int | x <- ["1", "Foo", "3"] ]
[Just 1,Nothing,Just 3]
>>> catMaybes $ [readMaybe x :: Maybe Int | x <- ["1", "Foo", "3"] ]
[1,3]

mapMaybe :: (a -> Maybe b) -> [a] -> [b] #

The mapMaybe function is a version of map which can throw out elements. In particular, the functional argument returns something of type Maybe b. If this is Nothing, no element is added on to the result list. If it is Just b, then b is included in the result list.

Examples

Expand

Using mapMaybe f x is a shortcut for catMaybes $ map f x in most cases:

>>> import Text.Read ( readMaybe )
>>> let readMaybeInt = readMaybe :: String -> Maybe Int
>>> mapMaybe readMaybeInt ["1", "Foo", "3"]
[1,3]
>>> catMaybes $ map readMaybeInt ["1", "Foo", "3"]
[1,3]

If we map the Just constructor, the entire list should be returned:

>>> mapMaybe Just [1,2,3]
[1,2,3]

head :: [a] -> a #

Extract the first element of a list, which must be non-empty.

tail :: [a] -> [a] #

Extract the elements after the head of a list, which must be non-empty.

last :: [a] -> a #

Extract the last element of a list, which must be finite and non-empty.

init :: [a] -> [a] #

Return all the elements of a list except the last one. The list must be non-empty.

scanl :: (b -> a -> b) -> b -> [a] -> [b] #

scanl is similar to foldl, but returns a list of successive reduced values from the left:

scanl f z [x1, x2, ...] == [z, z `f` x1, (z `f` x1) `f` x2, ...]

Note that

last (scanl f z xs) == foldl f z xs.

scanl1 :: (a -> a -> a) -> [a] -> [a] #

scanl1 is a variant of scanl that has no starting value argument:

scanl1 f [x1, x2, ...] == [x1, x1 `f` x2, ...]

scanr :: (a -> b -> b) -> b -> [a] -> [b] #

scanr is the right-to-left dual of scanl. Note that

head (scanr f z xs) == foldr f z xs.

scanr1 :: (a -> a -> a) -> [a] -> [a] #

scanr1 is a variant of scanr that has no starting value argument.

iterate :: (a -> a) -> a -> [a] #

iterate f x returns an infinite list of repeated applications of f to x:

iterate f x == [x, f x, f (f x), ...]

Note that iterate is lazy, potentially leading to thunk build-up if the consumer doesn't force each iterate. See 'iterate\'' for a strict variant of this function.

repeat :: a -> [a] #

repeat x is an infinite list, with x the value of every element.

replicate :: Int -> a -> [a] #

replicate n x is a list of length n with x the value of every element. It is an instance of the more general genericReplicate, in which n may be of any integral type.

cycle :: [a] -> [a] #

cycle ties a finite list into a circular one, or equivalently, the infinite repetition of the original list. It is the identity on infinite lists.

takeWhile :: (a -> Bool) -> [a] -> [a] #

takeWhile, applied to a predicate p and a list xs, returns the longest prefix (possibly empty) of xs of elements that satisfy p:

takeWhile (< 3) [1,2,3,4,1,2,3,4] == [1,2]
takeWhile (< 9) [1,2,3] == [1,2,3]
takeWhile (< 0) [1,2,3] == []

dropWhile :: (a -> Bool) -> [a] -> [a] #

dropWhile p xs returns the suffix remaining after takeWhile p xs:

dropWhile (< 3) [1,2,3,4,5,1,2,3] == [3,4,5,1,2,3]
dropWhile (< 9) [1,2,3] == []
dropWhile (< 0) [1,2,3] == [1,2,3]

take :: Int -> [a] -> [a] #

take n, applied to a list xs, returns the prefix of xs of length n, or xs itself if n > length xs:

take 5 "Hello World!" == "Hello"
take 3 [1,2,3,4,5] == [1,2,3]
take 3 [1,2] == [1,2]
take 3 [] == []
take (-1) [1,2] == []
take 0 [1,2] == []

It is an instance of the more general genericTake, in which n may be of any integral type.

drop :: Int -> [a] -> [a] #

drop n xs returns the suffix of xs after the first n elements, or [] if n > length xs:

drop 6 "Hello World!" == "World!"
drop 3 [1,2,3,4,5] == [4,5]
drop 3 [1,2] == []
drop 3 [] == []
drop (-1) [1,2] == [1,2]
drop 0 [1,2] == [1,2]

It is an instance of the more general genericDrop, in which n may be of any integral type.

splitAt :: Int -> [a] -> ([a], [a]) #

splitAt n xs returns a tuple where first element is xs prefix of length n and second element is the remainder of the list:

splitAt 6 "Hello World!" == ("Hello ","World!")
splitAt 3 [1,2,3,4,5] == ([1,2,3],[4,5])
splitAt 1 [1,2,3] == ([1],[2,3])
splitAt 3 [1,2,3] == ([1,2,3],[])
splitAt 4 [1,2,3] == ([1,2,3],[])
splitAt 0 [1,2,3] == ([],[1,2,3])
splitAt (-1) [1,2,3] == ([],[1,2,3])

It is equivalent to (take n xs, drop n xs) when n is not _|_ (splitAt _|_ xs = _|_). splitAt is an instance of the more general genericSplitAt, in which n may be of any integral type.

span :: (a -> Bool) -> [a] -> ([a], [a]) #

span, applied to a predicate p and a list xs, returns a tuple where first element is longest prefix (possibly empty) of xs of elements that satisfy p and second element is the remainder of the list:

span (< 3) [1,2,3,4,1,2,3,4] == ([1,2],[3,4,1,2,3,4])
span (< 9) [1,2,3] == ([1,2,3],[])
span (< 0) [1,2,3] == ([],[1,2,3])

span p xs is equivalent to (takeWhile p xs, dropWhile p xs)

break :: (a -> Bool) -> [a] -> ([a], [a]) #

break, applied to a predicate p and a list xs, returns a tuple where first element is longest prefix (possibly empty) of xs of elements that do not satisfy p and second element is the remainder of the list:

break (> 3) [1,2,3,4,1,2,3,4] == ([1,2,3],[4,1,2,3,4])
break (< 9) [1,2,3] == ([],[1,2,3])
break (> 9) [1,2,3] == ([1,2,3],[])

break p is equivalent to span (not . p).

reverse :: [a] -> [a] #

reverse xs returns the elements of xs in reverse order. xs must be finite.

lookup :: Eq a => a -> [(a, b)] -> Maybe b #

lookup key assocs looks up a key in an association list.

(!!) :: [a] -> Int -> a infixl 9 #

List index (subscript) operator, starting from 0. It is an instance of the more general genericIndex, which takes an index of any integral type.

zip3 :: [a] -> [b] -> [c] -> [(a, b, c)] #

zip3 takes three lists and returns a list of triples, analogous to zip.

zipWith :: (a -> b -> c) -> [a] -> [b] -> [c] #

zipWith generalises zip by zipping with the function given as the first argument, instead of a tupling function. For example, zipWith (+) is applied to two lists to produce the list of corresponding sums.

zipWith is right-lazy:

zipWith f [] _|_ = []

zipWith3 :: (a -> b -> c -> d) -> [a] -> [b] -> [c] -> [d] #

The zipWith3 function takes a function which combines three elements, as well as three lists and returns a list of their point-wise combination, analogous to zipWith.

unzip :: [(a, b)] -> ([a], [b]) #

unzip transforms a list of pairs into a list of first components and a list of second components.

unzip3 :: [(a, b, c)] -> ([a], [b], [c]) #

The unzip3 function takes a list of triples and returns three lists, analogous to unzip.

chr :: Int -> Char #

The toEnum method restricted to the type Char.

(<$>) :: Functor f => (a -> b) -> f a -> f b infixl 4 #

An infix synonym for fmap.

The name of this operator is an allusion to $. Note the similarities between their types:

 ($)  ::              (a -> b) ->   a ->   b
(<$>) :: Functor f => (a -> b) -> f a -> f b

Whereas $ is function application, <$> is function application lifted over a Functor.

Examples

Expand

Convert from a Maybe Int to a Maybe String using show:

>>> show <$> Nothing
Nothing
>>> show <$> Just 3
Just "3"

Convert from an Either Int Int to an Either Int String using show:

>>> show <$> Left 17
Left 17
>>> show <$> Right 17
Right "17"

Double each element of a list:

>>> (*2) <$> [1,2,3]
[2,4,6]

Apply even to the second element of a pair:

>>> even <$> (2,2)
(2,True)

void :: Functor f => f a -> f () #

void value discards or ignores the result of evaluation, such as the return value of an IO action.

Examples

Expand

Replace the contents of a Maybe Int with unit:

>>> void Nothing
Nothing
>>> void (Just 3)
Just ()

Replace the contents of an Either Int Int with unit, resulting in an Either Int '()':

>>> void (Left 8675309)
Left 8675309
>>> void (Right 8675309)
Right ()

Replace every element of a list with unit:

>>> void [1,2,3]
[(),(),()]

Replace the second element of a pair with unit:

>>> void (1,2)
(1,())

Discard the result of an IO action:

>>> mapM print [1,2]
1
2
[(),()]
>>> void $ mapM print [1,2]
1
2

isSpace :: Char -> Bool #

Returns True for any Unicode space character, and the control characters \t, \n, \r, \f, \v.

isDigit :: Char -> Bool #

Selects ASCII digits, i.e. '0'..'9'.

isAlpha :: Char -> Bool #

Selects alphabetic Unicode characters (lower-case, upper-case and title-case letters, plus letters of caseless scripts and modifiers letters). This function is equivalent to isLetter.

isAlphaNum :: Char -> Bool #

Selects alphabetic or numeric Unicode characters.

Note that numeric digits outside the ASCII range, as well as numeric characters which aren't digits, are selected by this function but not by isDigit. Such characters may be part of identifiers but are not used by the printer and reader to represent numbers.

isUpper :: Char -> Bool #

Selects upper-case or title-case alphabetic Unicode characters (letters). Title case is used by a small number of letter ligatures like the single-character form of Lj.

toLower :: Char -> Char #

Convert a letter to the corresponding lower-case letter, if any. Any other character is returned unchanged.

toUpper :: Char -> Char #

Convert a letter to the corresponding upper-case letter, if any. Any other character is returned unchanged.

isPrefixOf :: Eq a => [a] -> [a] -> Bool #

The isPrefixOf function takes two lists and returns True iff the first list is a prefix of the second.

>>> "Hello" `isPrefixOf` "Hello World!"
True

>>> "Hello" `isPrefixOf` "Wello Horld!"
False

isSuffixOf :: Eq a => [a] -> [a] -> Bool #

The isSuffixOf function takes two lists and returns True iff the first list is a suffix of the second. The second list must be finite.

>>> "ld!" `isSuffixOf` "Hello World!"
True

>>> "World" `isSuffixOf` "Hello World!"
False

isInfixOf :: Eq a => [a] -> [a] -> Bool #

The isInfixOf function takes two lists and returns True iff the first list is contained, wholly and intact, anywhere within the second.

>>> isInfixOf "Haskell" "I really like Haskell."
True

>>> isInfixOf "Ial" "I really like Haskell."
False

nub :: Eq a => [a] -> [a] #

O(n^2). The nub function removes duplicate elements from a list. In particular, it keeps only the first occurrence of each element. (The name nub means `essence'.) It is a special case of nubBy, which allows the programmer to supply their own equality test.

>>> nub [1,2,3,4,3,2,1,2,4,3,5]
[1,2,3,4,5]

nubBy :: (a -> a -> Bool) -> [a] -> [a] #

The nubBy function behaves just like nub, except it uses a user-supplied equality predicate instead of the overloaded == function.

>>> nubBy (\x y -> mod x 3 == mod y 3) [1,2,4,5,6]
[1,2,6]

intersperse :: a -> [a] -> [a] #

The intersperse function takes an element and a list and `intersperses' that element between the elements of the list. For example,

>>> intersperse ',' "abcde"
"a,b,c,d,e"

intercalate :: [a] -> [[a]] -> [a] #

intercalate xs xss is equivalent to (concat (intersperse xs xss)). It inserts the list xs in between the lists in xss and concatenates the result.

>>> intercalate ", " ["Lorem", "ipsum", "dolor"]
"Lorem, ipsum, dolor"

sort :: Ord a => [a] -> [a] #

The sort function implements a stable sorting algorithm. It is a special case of sortBy, which allows the programmer to supply their own comparison function.

Elements are arranged from from lowest to highest, keeping duplicates in the order they appeared in the input.

>>> sort [1,6,4,3,2,5]
[1,2,3,4,5,6]

sortBy :: (a -> a -> Ordering) -> [a] -> [a] #

The sortBy function is the non-overloaded version of sort.

>>> sortBy (\(a,_) (b,_) -> compare a b) [(2, "world"), (4, "!"), (1, "Hello")]
[(1,"Hello"),(2,"world"),(4,"!")]

unfoldr :: (b -> Maybe (a, b)) -> b -> [a] #

The unfoldr function is a `dual' to foldr: while foldr reduces a list to a summary value, unfoldr builds a list from a seed value. The function takes the element and returns Nothing if it is done producing the list or returns Just (a,b), in which case, a is a prepended to the list and b is used as the next element in a recursive call. For example,

iterate f == unfoldr (\x -> Just (x, f x))

In some cases, unfoldr can undo a foldr operation:

unfoldr f' (foldr f z xs) == xs

if the following holds:

f' (f x y) = Just (x,y)
f' z       = Nothing

A simple use of unfoldr:

>>> unfoldr (\b -> if b == 0 then Nothing else Just (b, b-1)) 10
[10,9,8,7,6,5,4,3,2,1]

lines :: String -> [String] #

lines breaks a string up into a list of strings at newline characters. The resulting strings do not contain newlines.

Note that after splitting the string at newline characters, the last part of the string is considered a line even if it doesn't end with a newline. For example,

>>> lines ""
[]

>>> lines "\n"
[""]

>>> lines "one"
["one"]

>>> lines "one\n"
["one"]

>>> lines "one\n\n"
["one",""]

>>> lines "one\ntwo"
["one","two"]

>>> lines "one\ntwo\n"
["one","two"]

Thus lines s contains at least as many elements as newlines in s.

unlines :: [String] -> String #

unlines is an inverse operation to lines. It joins lines, after appending a terminating newline to each.

>>> unlines ["Hello", "World", "!"]
"Hello\nWorld\n!\n"

words :: String -> [String] #

words breaks a string up into a list of words, which were delimited by white space.

>>> words "Lorem ipsum\ndolor"
["Lorem","ipsum","dolor"]

unwords :: [String] -> String #

unwords is an inverse operation to words. It joins words with separating spaces.

>>> unwords ["Lorem", "ipsum", "dolor"]
"Lorem ipsum dolor"

newtype Any #

Boolean monoid under disjunction (||).

>>> getAny (Any True <> mempty <> Any False)
True

>>> getAny (mconcat (map (\x -> Any (even x)) [2,4,6,7,8]))
True

Constructors

Any
Fields getAny :: Bool

Instances

Bounded Any	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods minBound :: Any # maxBound :: Any #
Eq Any	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods (==) :: Any -> Any -> Bool # (/=) :: Any -> Any -> Bool #
Data Any	Since: base-4.8.0.0
Instance details Defined in Data.Data Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Any -> c Any # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Any # toConstr :: Any -> Constr # dataTypeOf :: Any -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Any) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Any) # gmapT :: (forall b. Data b => b -> b) -> Any -> Any # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Any -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Any -> r # gmapQ :: (forall d. Data d => d -> u) -> Any -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Any -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Any -> m Any # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Any -> m Any # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Any -> m Any #
Ord Any	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods compare :: Any -> Any -> Ordering # (<) :: Any -> Any -> Bool # (<=) :: Any -> Any -> Bool # (>) :: Any -> Any -> Bool # (>=) :: Any -> Any -> Bool # max :: Any -> Any -> Any # min :: Any -> Any -> Any #
Read Any	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods readsPrec :: Int -> ReadS Any # readList :: ReadS [Any] # readPrec :: ReadPrec Any # readListPrec :: ReadPrec [Any] #
Show Any	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods showsPrec :: Int -> Any -> ShowS # show :: Any -> String # showList :: [Any] -> ShowS #
Generic Any
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep Any :: Type -> Type # Methods from :: Any -> Rep Any x # to :: Rep Any x -> Any #
Semigroup Any	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup.Internal Methods (<>) :: Any -> Any -> Any # sconcat :: NonEmpty Any -> Any # stimes :: Integral b => b -> Any -> Any #
Monoid Any	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods mempty :: Any # mappend :: Any -> Any -> Any # mconcat :: [Any] -> Any #
NFData Any	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Any -> () #
type Rep Any	Since: base-4.7.0.0
Instance details Defined in Data.Semigroup.Internal type Rep Any = D1 (MetaData "Any" "Data.Semigroup.Internal" "base" True) (C1 (MetaCons "Any" PrefixI True) (S1 (MetaSel (Just "getAny") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Bool)))

newtype All #

Boolean monoid under conjunction (&&).

>>> getAll (All True <> mempty <> All False)
False

>>> getAll (mconcat (map (\x -> All (even x)) [2,4,6,7,8]))
False

Constructors

All
Fields getAll :: Bool

Instances

Bounded All	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods minBound :: All # maxBound :: All #
Eq All	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods (==) :: All -> All -> Bool # (/=) :: All -> All -> Bool #
Data All	Since: base-4.8.0.0
Instance details Defined in Data.Data Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> All -> c All # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c All # toConstr :: All -> Constr # dataTypeOf :: All -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c All) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c All) # gmapT :: (forall b. Data b => b -> b) -> All -> All # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> All -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> All -> r # gmapQ :: (forall d. Data d => d -> u) -> All -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> All -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> All -> m All # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> All -> m All # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> All -> m All #
Ord All	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods compare :: All -> All -> Ordering # (<) :: All -> All -> Bool # (<=) :: All -> All -> Bool # (>) :: All -> All -> Bool # (>=) :: All -> All -> Bool # max :: All -> All -> All # min :: All -> All -> All #
Read All	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods readsPrec :: Int -> ReadS All # readList :: ReadS [All] # readPrec :: ReadPrec All # readListPrec :: ReadPrec [All] #
Show All	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods showsPrec :: Int -> All -> ShowS # show :: All -> String # showList :: [All] -> ShowS #
Generic All
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep All :: Type -> Type # Methods from :: All -> Rep All x # to :: Rep All x -> All #
Semigroup All	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup.Internal Methods (<>) :: All -> All -> All # sconcat :: NonEmpty All -> All # stimes :: Integral b => b -> All -> All #
Monoid All	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods mempty :: All # mappend :: All -> All -> All # mconcat :: [All] -> All #
NFData All	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: All -> () #
type Rep All	Since: base-4.7.0.0
Instance details Defined in Data.Semigroup.Internal type Rep All = D1 (MetaData "All" "Data.Semigroup.Internal" "base" True) (C1 (MetaCons "All" PrefixI True) (S1 (MetaSel (Just "getAll") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Bool)))

traverse_ :: (Foldable t, Applicative f) => (a -> f b) -> t a -> f () #

Map each element of a structure to an action, evaluate these actions from left to right, and ignore the results. For a version that doesn't ignore the results see traverse.

for_ :: (Foldable t, Applicative f) => t a -> (a -> f b) -> f () #

for_ is traverse_ with its arguments flipped. For a version that doesn't ignore the results see for.

>>> for_ [1..4] print
1
2
3
4

sequence_ :: (Foldable t, Monad m) => t (m a) -> m () #

Evaluate each monadic action in the structure from left to right, and ignore the results. For a version that doesn't ignore the results see sequence.

As of base 4.8.0.0, sequence_ is just sequenceA_, specialized to Monad.

concat :: Foldable t => t [a] -> [a] #

The concatenation of all the elements of a container of lists.

concatMap :: Foldable t => (a -> [b]) -> t a -> [b] #

Map a function over all the elements of a container and concatenate the resulting lists.

and :: Foldable t => t Bool -> Bool #

and returns the conjunction of a container of Bools. For the result to be True, the container must be finite; False, however, results from a False value finitely far from the left end.

or :: Foldable t => t Bool -> Bool #

or returns the disjunction of a container of Bools. For the result to be False, the container must be finite; True, however, results from a True value finitely far from the left end.

any :: Foldable t => (a -> Bool) -> t a -> Bool #

Determines whether any element of the structure satisfies the predicate.

all :: Foldable t => (a -> Bool) -> t a -> Bool #

Determines whether all elements of the structure satisfy the predicate.

notElem :: (Foldable t, Eq a) => a -> t a -> Bool infix 4 #

notElem is the negation of elem.

find :: Foldable t => (a -> Bool) -> t a -> Maybe a #

The find function takes a predicate and a structure and returns the leftmost element of the structure matching the predicate, or Nothing if there is no such element.

optional :: Alternative f => f a -> f (Maybe a) #

One or none.

for :: (Traversable t, Applicative f) => t a -> (a -> f b) -> f (t b) #

for is traverse with its arguments flipped. For a version that ignores the results see for_.

filterM :: Applicative m => (a -> m Bool) -> [a] -> m [a] #

This generalizes the list-based filter function.

foldM :: (Foldable t, Monad m) => (b -> a -> m b) -> b -> t a -> m b #

The foldM function is analogous to foldl, except that its result is encapsulated in a monad. Note that foldM works from left-to-right over the list arguments. This could be an issue where (>>) and the `folded function' are not commutative.

foldM f a1 [x1, x2, ..., xm]

==

do
  a2 <- f a1 x1
  a3 <- f a2 x2
  ...
  f am xm

If right-to-left evaluation is required, the input list should be reversed.

Note: foldM is the same as foldlM

unless :: Applicative f => Bool -> f () -> f () #

The reverse of when.

data Set a #

A set of values a.

Instances

Foldable Set
Instance details Defined in Data.Set.Internal Methods fold :: Monoid m => Set m -> m # foldMap :: Monoid m => (a -> m) -> Set a -> m # foldr :: (a -> b -> b) -> b -> Set a -> b # foldr' :: (a -> b -> b) -> b -> Set a -> b # foldl :: (b -> a -> b) -> b -> Set a -> b # foldl' :: (b -> a -> b) -> b -> Set a -> b # foldr1 :: (a -> a -> a) -> Set a -> a # foldl1 :: (a -> a -> a) -> Set a -> a # toList :: Set a -> [a] # null :: Set a -> Bool # length :: Set a -> Int # elem :: Eq a => a -> Set a -> Bool # maximum :: Ord a => Set a -> a # minimum :: Ord a => Set a -> a # sum :: Num a => Set a -> a # product :: Num a => Set a -> a #
ToJSON1 Set
Instance details Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a -> Value) -> ([a] -> Value) -> Set a -> Value # liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Set a] -> Value # liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Set a -> Encoding # liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Set a] -> Encoding #
Eq1 Set	Since: containers-0.5.9
Instance details Defined in Data.Set.Internal Methods liftEq :: (a -> b -> Bool) -> Set a -> Set b -> Bool #
Ord1 Set	Since: containers-0.5.9
Instance details Defined in Data.Set.Internal Methods liftCompare :: (a -> b -> Ordering) -> Set a -> Set b -> Ordering #
Show1 Set	Since: containers-0.5.9
Instance details Defined in Data.Set.Internal Methods liftShowsPrec :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> Int -> Set a -> ShowS # liftShowList :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> [Set a] -> ShowS #
Ord a => IsList (Set a)	Since: containers-0.5.6.2
Instance details Defined in Data.Set.Internal Associated Types type Item (Set a) :: Type # Methods fromList :: [Item (Set a)] -> Set a # fromListN :: Int -> [Item (Set a)] -> Set a # toList :: Set a -> [Item (Set a)] #
Eq a => Eq (Set a)
Instance details Defined in Data.Set.Internal Methods (==) :: Set a -> Set a -> Bool # (/=) :: Set a -> Set a -> Bool #
(Data a, Ord a) => Data (Set a)
Instance details Defined in Data.Set.Internal Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Set a -> c (Set a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Set a) # toConstr :: Set a -> Constr # dataTypeOf :: Set a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Set a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Set a)) # gmapT :: (forall b. Data b => b -> b) -> Set a -> Set a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Set a -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Set a -> r # gmapQ :: (forall d. Data d => d -> u) -> Set a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Set a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Set a -> m (Set a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Set a -> m (Set a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Set a -> m (Set a) #
Ord a => Ord (Set a)
Instance details Defined in Data.Set.Internal Methods compare :: Set a -> Set a -> Ordering # (<) :: Set a -> Set a -> Bool # (<=) :: Set a -> Set a -> Bool # (>) :: Set a -> Set a -> Bool # (>=) :: Set a -> Set a -> Bool # max :: Set a -> Set a -> Set a # min :: Set a -> Set a -> Set a #
(Read a, Ord a) => Read (Set a)
Instance details Defined in Data.Set.Internal Methods readsPrec :: Int -> ReadS (Set a) # readList :: ReadS [Set a] # readPrec :: ReadPrec (Set a) # readListPrec :: ReadPrec [Set a] #
Show a => Show (Set a)
Instance details Defined in Data.Set.Internal Methods showsPrec :: Int -> Set a -> ShowS # show :: Set a -> String # showList :: [Set a] -> ShowS #
Ord a => Semigroup (Set a)	Since: containers-0.5.7
Instance details Defined in Data.Set.Internal Methods (<>) :: Set a -> Set a -> Set a # sconcat :: NonEmpty (Set a) -> Set a # stimes :: Integral b => b -> Set a -> Set a #
Ord a => Monoid (Set a)
Instance details Defined in Data.Set.Internal Methods mempty :: Set a # mappend :: Set a -> Set a -> Set a # mconcat :: [Set a] -> Set a #
NFData a => NFData (Set a)
Instance details Defined in Data.Set.Internal Methods rnf :: Set a -> () #
ToJSON a => ToJSON (Set a)
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: Set a -> Value # toEncoding :: Set a -> Encoding # toJSONList :: [Set a] -> Value # toEncodingList :: [Set a] -> Encoding #
(Ord a, FromJSON a) => FromJSON (Set a)
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser (Set a) # parseJSONList :: Value -> Parser [Set a] #
type Item (Set a)
Instance details Defined in Data.Set.Internal type Item (Set a) = a

(<**>) :: Applicative f => f a -> f (a -> b) -> f b infixl 4 #

A variant of <*> with the arguments reversed.

liftA :: Applicative f => (a -> b) -> f a -> f b #

Lift a function to actions. This function may be used as a value for fmap in a Functor instance.

liftA3 :: Applicative f => (a -> b -> c -> d) -> f a -> f b -> f c -> f d #

Lift a ternary function to actions.

liftM3 :: Monad m => (a1 -> a2 -> a3 -> r) -> m a1 -> m a2 -> m a3 -> m r #

Promote a function to a monad, scanning the monadic arguments from left to right (cf. liftM2).

liftM4 :: Monad m => (a1 -> a2 -> a3 -> a4 -> r) -> m a1 -> m a2 -> m a3 -> m a4 -> m r #

Promote a function to a monad, scanning the monadic arguments from left to right (cf. liftM2).

liftM5 :: Monad m => (a1 -> a2 -> a3 -> a4 -> a5 -> r) -> m a1 -> m a2 -> m a3 -> m a4 -> m a5 -> m r #

Promote a function to a monad, scanning the monadic arguments from left to right (cf. liftM2).

fix :: (a -> a) -> a #

fix f is the least fixed point of the function f, i.e. the least defined x such that f x = x.

For example, we can write the factorial function using direct recursion as

>>> let fac n = if n <= 1 then 1 else n * fac (n-1) in fac 5
120

This uses the fact that Haskell’s let introduces recursive bindings. We can rewrite this definition using fix,

>>> fix (\rec n -> if n <= 1 then 1 else n * rec (n-1)) 5
120

Instead of making a recursive call, we introduce a dummy parameter rec; when used within fix, this parameter then refers to fix' argument, hence the recursion is reintroduced.

readMaybe :: Read a => String -> Maybe a #

Parse a string using the Read instance. Succeeds if there is exactly one valid result.

>>> readMaybe "123" :: Maybe Int
Just 123

>>> readMaybe "hello" :: Maybe Int
Nothing

Since: base-4.6.0.0

mapM_ :: (Foldable t, Monad m) => (a -> m b) -> t a -> m () #

Map each element of a structure to a monadic action, evaluate these actions from left to right, and ignore the results. For a version that doesn't ignore the results see mapM.

As of base 4.8.0.0, mapM_ is just traverse_, specialized to Monad.

forM_ :: (Foldable t, Monad m) => t a -> (a -> m b) -> m () #

forM_ is mapM_ with its arguments flipped. For a version that doesn't ignore the results see forM.

As of base 4.8.0.0, forM_ is just for_, specialized to Monad.

msum :: (Foldable t, MonadPlus m) => t (m a) -> m a #

The sum of a collection of actions, generalizing concat. As of base 4.8.0.0, msum is just asum, specialized to MonadPlus.

newtype Const a (b :: k) :: forall k. Type -> k -> Type #

The Const functor.

Constructors

Const
Fields getConst :: a

Instances

Generic1 (Const a :: k -> Type)
Instance details Defined in Data.Functor.Const Associated Types type Rep1 (Const a) :: k -> Type # Methods from1 :: Const a a0 -> Rep1 (Const a) a0 # to1 :: Rep1 (Const a) a0 -> Const a a0 #
ToJSON2 (Const :: Type -> Type -> Type)
Instance details Defined in Data.Aeson.Types.ToJSON Methods liftToJSON2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> Const a b -> Value # liftToJSONList2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> [Const a b] -> Value # liftToEncoding2 :: (a -> Encoding) -> ([a] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> Const a b -> Encoding # liftToEncodingList2 :: (a -> Encoding) -> ([a] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> [Const a b] -> Encoding #
FromJSON2 (Const :: Type -> Type -> Type)
Instance details Defined in Data.Aeson.Types.FromJSON Methods liftParseJSON2 :: (Value -> Parser a) -> (Value -> Parser [a]) -> (Value -> Parser b) -> (Value -> Parser [b]) -> Value -> Parser (Const a b) # liftParseJSONList2 :: (Value -> Parser a) -> (Value -> Parser [a]) -> (Value -> Parser b) -> (Value -> Parser [b]) -> Value -> Parser [Const a b] #
Bifunctor (Const :: Type -> Type -> Type)	Since: base-4.8.0.0
Instance details Defined in Data.Bifunctor Methods bimap :: (a -> b) -> (c -> d) -> Const a c -> Const b d # first :: (a -> b) -> Const a c -> Const b c # second :: (b -> c) -> Const a b -> Const a c #
Eq2 (Const :: Type -> Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Classes Methods liftEq2 :: (a -> b -> Bool) -> (c -> d -> Bool) -> Const a c -> Const b d -> Bool #
Ord2 (Const :: Type -> Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Classes Methods liftCompare2 :: (a -> b -> Ordering) -> (c -> d -> Ordering) -> Const a c -> Const b d -> Ordering #
Read2 (Const :: Type -> Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Classes Methods liftReadsPrec2 :: (Int -> ReadS a) -> ReadS [a] -> (Int -> ReadS b) -> ReadS [b] -> Int -> ReadS (Const a b) # liftReadList2 :: (Int -> ReadS a) -> ReadS [a] -> (Int -> ReadS b) -> ReadS [b] -> ReadS [Const a b] # liftReadPrec2 :: ReadPrec a -> ReadPrec [a] -> ReadPrec b -> ReadPrec [b] -> ReadPrec (Const a b) # liftReadListPrec2 :: ReadPrec a -> ReadPrec [a] -> ReadPrec b -> ReadPrec [b] -> ReadPrec [Const a b] #
Show2 (Const :: Type -> Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Classes Methods liftShowsPrec2 :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> (Int -> b -> ShowS) -> ([b] -> ShowS) -> Int -> Const a b -> ShowS # liftShowList2 :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> (Int -> b -> ShowS) -> ([b] -> ShowS) -> [Const a b] -> ShowS #
NFData2 (Const :: Type -> Type -> Type)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> Const a b -> () #
Hashable2 (Const :: Type -> Type -> Type)
Instance details Defined in Data.Hashable.Class Methods liftHashWithSalt2 :: (Int -> a -> Int) -> (Int -> b -> Int) -> Int -> Const a b -> Int #
Functor (Const m :: Type -> Type)	Since: base-2.1
Instance details Defined in Data.Functor.Const Methods fmap :: (a -> b) -> Const m a -> Const m b # (<$) :: a -> Const m b -> Const m a #
Monoid m => Applicative (Const m :: Type -> Type)	Since: base-2.0.1
Instance details Defined in Data.Functor.Const Methods pure :: a -> Const m a # (<>) :: Const m (a -> b) -> Const m a -> Const m b # liftA2 :: (a -> b -> c) -> Const m a -> Const m b -> Const m c # (>) :: Const m a -> Const m b -> Const m b # (<*) :: Const m a -> Const m b -> Const m a #
Foldable (Const m :: Type -> Type)	Since: base-4.7.0.0
Instance details Defined in Data.Functor.Const Methods fold :: Monoid m0 => Const m m0 -> m0 # foldMap :: Monoid m0 => (a -> m0) -> Const m a -> m0 # foldr :: (a -> b -> b) -> b -> Const m a -> b # foldr' :: (a -> b -> b) -> b -> Const m a -> b # foldl :: (b -> a -> b) -> b -> Const m a -> b # foldl' :: (b -> a -> b) -> b -> Const m a -> b # foldr1 :: (a -> a -> a) -> Const m a -> a # foldl1 :: (a -> a -> a) -> Const m a -> a # toList :: Const m a -> [a] # null :: Const m a -> Bool # length :: Const m a -> Int # elem :: Eq a => a -> Const m a -> Bool # maximum :: Ord a => Const m a -> a # minimum :: Ord a => Const m a -> a # sum :: Num a => Const m a -> a # product :: Num a => Const m a -> a #
Traversable (Const m :: Type -> Type)	Since: base-4.7.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Const m a -> f (Const m b) # sequenceA :: Applicative f => Const m (f a) -> f (Const m a) # mapM :: Monad m0 => (a -> m0 b) -> Const m a -> m0 (Const m b) # sequence :: Monad m0 => Const m (m0 a) -> m0 (Const m a) #
ToJSON a => ToJSON1 (Const a :: Type -> Type)
Instance details Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> Const a a0 -> Value # liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [Const a a0] -> Value # liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> Const a a0 -> Encoding # liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [Const a a0] -> Encoding #
FromJSON a => FromJSON1 (Const a :: Type -> Type)
Instance details Defined in Data.Aeson.Types.FromJSON Methods liftParseJSON :: (Value -> Parser a0) -> (Value -> Parser [a0]) -> Value -> Parser (Const a a0) # liftParseJSONList :: (Value -> Parser a0) -> (Value -> Parser [a0]) -> Value -> Parser [Const a a0] #
Eq a => Eq1 (Const a :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Classes Methods liftEq :: (a0 -> b -> Bool) -> Const a a0 -> Const a b -> Bool #
Ord a => Ord1 (Const a :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Classes Methods liftCompare :: (a0 -> b -> Ordering) -> Const a a0 -> Const a b -> Ordering #
Read a => Read1 (Const a :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Classes Methods liftReadsPrec :: (Int -> ReadS a0) -> ReadS [a0] -> Int -> ReadS (Const a a0) # liftReadList :: (Int -> ReadS a0) -> ReadS [a0] -> ReadS [Const a a0] # liftReadPrec :: ReadPrec a0 -> ReadPrec [a0] -> ReadPrec (Const a a0) # liftReadListPrec :: ReadPrec a0 -> ReadPrec [a0] -> ReadPrec [Const a a0] #
Show a => Show1 (Const a :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Classes Methods liftShowsPrec :: (Int -> a0 -> ShowS) -> ([a0] -> ShowS) -> Int -> Const a a0 -> ShowS # liftShowList :: (Int -> a0 -> ShowS) -> ([a0] -> ShowS) -> [Const a a0] -> ShowS #
NFData a => NFData1 (Const a :: Type -> Type)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a0 -> ()) -> Const a a0 -> () #
Hashable a => Hashable1 (Const a :: Type -> Type)
Instance details Defined in Data.Hashable.Class Methods liftHashWithSalt :: (Int -> a0 -> Int) -> Int -> Const a a0 -> Int #
Bounded a => Bounded (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods minBound :: Const a b # maxBound :: Const a b #
Enum a => Enum (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods succ :: Const a b -> Const a b # pred :: Const a b -> Const a b # toEnum :: Int -> Const a b # fromEnum :: Const a b -> Int # enumFrom :: Const a b -> [Const a b] # enumFromThen :: Const a b -> Const a b -> [Const a b] # enumFromTo :: Const a b -> Const a b -> [Const a b] # enumFromThenTo :: Const a b -> Const a b -> Const a b -> [Const a b] #
Eq a => Eq (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods (==) :: Const a b -> Const a b -> Bool # (/=) :: Const a b -> Const a b -> Bool #
Floating a => Floating (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods pi :: Const a b # exp :: Const a b -> Const a b # log :: Const a b -> Const a b # sqrt :: Const a b -> Const a b # (**) :: Const a b -> Const a b -> Const a b # logBase :: Const a b -> Const a b -> Const a b # sin :: Const a b -> Const a b # cos :: Const a b -> Const a b # tan :: Const a b -> Const a b # asin :: Const a b -> Const a b # acos :: Const a b -> Const a b # atan :: Const a b -> Const a b # sinh :: Const a b -> Const a b # cosh :: Const a b -> Const a b # tanh :: Const a b -> Const a b # asinh :: Const a b -> Const a b # acosh :: Const a b -> Const a b # atanh :: Const a b -> Const a b # log1p :: Const a b -> Const a b # expm1 :: Const a b -> Const a b # log1pexp :: Const a b -> Const a b # log1mexp :: Const a b -> Const a b #
Fractional a => Fractional (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods (/) :: Const a b -> Const a b -> Const a b # recip :: Const a b -> Const a b # fromRational :: Rational -> Const a b #
Integral a => Integral (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods quot :: Const a b -> Const a b -> Const a b # rem :: Const a b -> Const a b -> Const a b # div :: Const a b -> Const a b -> Const a b # mod :: Const a b -> Const a b -> Const a b # quotRem :: Const a b -> Const a b -> (Const a b, Const a b) # divMod :: Const a b -> Const a b -> (Const a b, Const a b) # toInteger :: Const a b -> Integer #
(Typeable k, Data a, Typeable b) => Data (Const a b)	Since: base-4.10.0.0
Instance details Defined in Data.Data Methods gfoldl :: (forall d b0. Data d => c (d -> b0) -> d -> c b0) -> (forall g. g -> c g) -> Const a b -> c (Const a b) # gunfold :: (forall b0 r. Data b0 => c (b0 -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Const a b) # toConstr :: Const a b -> Constr # dataTypeOf :: Const a b -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Const a b)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Const a b)) # gmapT :: (forall b0. Data b0 => b0 -> b0) -> Const a b -> Const a b # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Const a b -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Const a b -> r # gmapQ :: (forall d. Data d => d -> u) -> Const a b -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Const a b -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Const a b -> m (Const a b) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Const a b -> m (Const a b) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Const a b -> m (Const a b) #
Num a => Num (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods (+) :: Const a b -> Const a b -> Const a b # (-) :: Const a b -> Const a b -> Const a b # (*) :: Const a b -> Const a b -> Const a b # negate :: Const a b -> Const a b # abs :: Const a b -> Const a b # signum :: Const a b -> Const a b # fromInteger :: Integer -> Const a b #
Ord a => Ord (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods compare :: Const a b -> Const a b -> Ordering # (<) :: Const a b -> Const a b -> Bool # (<=) :: Const a b -> Const a b -> Bool # (>) :: Const a b -> Const a b -> Bool # (>=) :: Const a b -> Const a b -> Bool # max :: Const a b -> Const a b -> Const a b # min :: Const a b -> Const a b -> Const a b #
Read a => Read (Const a b)	This instance would be equivalent to the derived instances of the `Const` newtype if the `runConst` field were removed Since: base-4.8.0.0
Instance details Defined in Data.Functor.Const Methods readsPrec :: Int -> ReadS (Const a b) # readList :: ReadS [Const a b] # readPrec :: ReadPrec (Const a b) # readListPrec :: ReadPrec [Const a b] #
Real a => Real (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods toRational :: Const a b -> Rational #
RealFloat a => RealFloat (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods floatRadix :: Const a b -> Integer # floatDigits :: Const a b -> Int # floatRange :: Const a b -> (Int, Int) # decodeFloat :: Const a b -> (Integer, Int) # encodeFloat :: Integer -> Int -> Const a b # exponent :: Const a b -> Int # significand :: Const a b -> Const a b # scaleFloat :: Int -> Const a b -> Const a b # isNaN :: Const a b -> Bool # isInfinite :: Const a b -> Bool # isDenormalized :: Const a b -> Bool # isNegativeZero :: Const a b -> Bool # isIEEE :: Const a b -> Bool # atan2 :: Const a b -> Const a b -> Const a b #
RealFrac a => RealFrac (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods properFraction :: Integral b0 => Const a b -> (b0, Const a b) # truncate :: Integral b0 => Const a b -> b0 # round :: Integral b0 => Const a b -> b0 # ceiling :: Integral b0 => Const a b -> b0 # floor :: Integral b0 => Const a b -> b0 #
Show a => Show (Const a b)	This instance would be equivalent to the derived instances of the `Const` newtype if the `runConst` field were removed Since: base-4.8.0.0
Instance details Defined in Data.Functor.Const Methods showsPrec :: Int -> Const a b -> ShowS # show :: Const a b -> String # showList :: [Const a b] -> ShowS #
Ix a => Ix (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods range :: (Const a b, Const a b) -> [Const a b] # index :: (Const a b, Const a b) -> Const a b -> Int # unsafeIndex :: (Const a b, Const a b) -> Const a b -> Int inRange :: (Const a b, Const a b) -> Const a b -> Bool # rangeSize :: (Const a b, Const a b) -> Int # unsafeRangeSize :: (Const a b, Const a b) -> Int
Generic (Const a b)
Instance details Defined in Data.Functor.Const Associated Types type Rep (Const a b) :: Type -> Type # Methods from :: Const a b -> Rep (Const a b) x # to :: Rep (Const a b) x -> Const a b #
Semigroup a => Semigroup (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods (<>) :: Const a b -> Const a b -> Const a b # sconcat :: NonEmpty (Const a b) -> Const a b # stimes :: Integral b0 => b0 -> Const a b -> Const a b #
Monoid a => Monoid (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods mempty :: Const a b # mappend :: Const a b -> Const a b -> Const a b # mconcat :: [Const a b] -> Const a b #
NFData a => NFData (Const a b)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Const a b -> () #
Hashable a => Hashable (Const a b)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Const a b -> Int # hash :: Const a b -> Int #
ToJSON a => ToJSON (Const a b)
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: Const a b -> Value # toEncoding :: Const a b -> Encoding # toJSONList :: [Const a b] -> Value # toEncodingList :: [Const a b] -> Encoding #
FromJSON a => FromJSON (Const a b)
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser (Const a b) # parseJSONList :: Value -> Parser [Const a b] #
Storable a => Storable (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods sizeOf :: Const a b -> Int # alignment :: Const a b -> Int # peekElemOff :: Ptr (Const a b) -> Int -> IO (Const a b) # pokeElemOff :: Ptr (Const a b) -> Int -> Const a b -> IO () # peekByteOff :: Ptr b0 -> Int -> IO (Const a b) # pokeByteOff :: Ptr b0 -> Int -> Const a b -> IO () # peek :: Ptr (Const a b) -> IO (Const a b) # poke :: Ptr (Const a b) -> Const a b -> IO () #
Bits a => Bits (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods (.&.) :: Const a b -> Const a b -> Const a b # (.\|.) :: Const a b -> Const a b -> Const a b # xor :: Const a b -> Const a b -> Const a b # complement :: Const a b -> Const a b # shift :: Const a b -> Int -> Const a b # rotate :: Const a b -> Int -> Const a b # zeroBits :: Const a b # bit :: Int -> Const a b # setBit :: Const a b -> Int -> Const a b # clearBit :: Const a b -> Int -> Const a b # complementBit :: Const a b -> Int -> Const a b # testBit :: Const a b -> Int -> Bool # bitSizeMaybe :: Const a b -> Maybe Int # bitSize :: Const a b -> Int # isSigned :: Const a b -> Bool # shiftL :: Const a b -> Int -> Const a b # unsafeShiftL :: Const a b -> Int -> Const a b # shiftR :: Const a b -> Int -> Const a b # unsafeShiftR :: Const a b -> Int -> Const a b # rotateL :: Const a b -> Int -> Const a b # rotateR :: Const a b -> Int -> Const a b # popCount :: Const a b -> Int #
FiniteBits a => FiniteBits (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const Methods finiteBitSize :: Const a b -> Int # countLeadingZeros :: Const a b -> Int # countTrailingZeros :: Const a b -> Int #
type Rep1 (Const a :: k -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const type Rep1 (Const a :: k -> Type) = D1 (MetaData "Const" "Data.Functor.Const" "base" True) (C1 (MetaCons "Const" PrefixI True) (S1 (MetaSel (Just "getConst") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 a)))
type Rep (Const a b)	Since: base-4.9.0.0
Instance details Defined in Data.Functor.Const type Rep (Const a b) = D1 (MetaData "Const" "Data.Functor.Const" "base" True) (C1 (MetaCons "Const" PrefixI True) (S1 (MetaSel (Just "getConst") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 a)))

newtype ZipList a #

Lists, but with an Applicative functor based on zipping.

Constructors

ZipList
Fields getZipList :: [a]

Instances

Functor ZipList	Since: base-2.1
Instance details Defined in Control.Applicative Methods fmap :: (a -> b) -> ZipList a -> ZipList b # (<$) :: a -> ZipList b -> ZipList a #
Applicative ZipList	f '<$>' 'ZipList' xs1 '<>' ... '<>' 'ZipList' xsN = 'ZipList' (zipWithN f xs1 ... xsN) where `zipWithN` refers to the `zipWith` function of the appropriate arity (`zipWith`, `zipWith3`, `zipWith4`, ...). For example: (\a b c -> stimes c [a, b]) <$> ZipList "abcd" <> ZipList "567" <> ZipList [1..] = ZipList (zipWith3 (\a b c -> stimes c [a, b]) "abcd" "567" [1..]) = ZipList {getZipList = ["a5","b6b6","c7c7c7"]} Since: base-2.1
Instance details Defined in Control.Applicative Methods pure :: a -> ZipList a # (<>) :: ZipList (a -> b) -> ZipList a -> ZipList b # liftA2 :: (a -> b -> c) -> ZipList a -> ZipList b -> ZipList c # (>) :: ZipList a -> ZipList b -> ZipList b # (<*) :: ZipList a -> ZipList b -> ZipList a #
Foldable ZipList	Since: base-4.9.0.0
Instance details Defined in Control.Applicative Methods fold :: Monoid m => ZipList m -> m # foldMap :: Monoid m => (a -> m) -> ZipList a -> m # foldr :: (a -> b -> b) -> b -> ZipList a -> b # foldr' :: (a -> b -> b) -> b -> ZipList a -> b # foldl :: (b -> a -> b) -> b -> ZipList a -> b # foldl' :: (b -> a -> b) -> b -> ZipList a -> b # foldr1 :: (a -> a -> a) -> ZipList a -> a # foldl1 :: (a -> a -> a) -> ZipList a -> a # toList :: ZipList a -> [a] # null :: ZipList a -> Bool # length :: ZipList a -> Int # elem :: Eq a => a -> ZipList a -> Bool # maximum :: Ord a => ZipList a -> a # minimum :: Ord a => ZipList a -> a # sum :: Num a => ZipList a -> a # product :: Num a => ZipList a -> a #
Traversable ZipList	Since: base-4.9.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> ZipList a -> f (ZipList b) # sequenceA :: Applicative f => ZipList (f a) -> f (ZipList a) # mapM :: Monad m => (a -> m b) -> ZipList a -> m (ZipList b) # sequence :: Monad m => ZipList (m a) -> m (ZipList a) #
Alternative ZipList	Since: base-4.11.0.0
Instance details Defined in Control.Applicative Methods empty :: ZipList a # (<\|>) :: ZipList a -> ZipList a -> ZipList a # some :: ZipList a -> ZipList [a] # many :: ZipList a -> ZipList [a] #
NFData1 ZipList	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> ZipList a -> () #
Eq a => Eq (ZipList a)	Since: base-4.7.0.0
Instance details Defined in Control.Applicative Methods (==) :: ZipList a -> ZipList a -> Bool # (/=) :: ZipList a -> ZipList a -> Bool #
Ord a => Ord (ZipList a)	Since: base-4.7.0.0
Instance details Defined in Control.Applicative Methods compare :: ZipList a -> ZipList a -> Ordering # (<) :: ZipList a -> ZipList a -> Bool # (<=) :: ZipList a -> ZipList a -> Bool # (>) :: ZipList a -> ZipList a -> Bool # (>=) :: ZipList a -> ZipList a -> Bool # max :: ZipList a -> ZipList a -> ZipList a # min :: ZipList a -> ZipList a -> ZipList a #
Read a => Read (ZipList a)	Since: base-4.7.0.0
Instance details Defined in Control.Applicative Methods readsPrec :: Int -> ReadS (ZipList a) # readList :: ReadS [ZipList a] # readPrec :: ReadPrec (ZipList a) # readListPrec :: ReadPrec [ZipList a] #
Show a => Show (ZipList a)	Since: base-4.7.0.0
Instance details Defined in Control.Applicative Methods showsPrec :: Int -> ZipList a -> ShowS # show :: ZipList a -> String # showList :: [ZipList a] -> ShowS #
Generic (ZipList a)
Instance details Defined in Control.Applicative Associated Types type Rep (ZipList a) :: Type -> Type # Methods from :: ZipList a -> Rep (ZipList a) x # to :: Rep (ZipList a) x -> ZipList a #
NFData a => NFData (ZipList a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: ZipList a -> () #
Generic1 ZipList
Instance details Defined in Control.Applicative Associated Types type Rep1 ZipList :: k -> Type # Methods from1 :: ZipList a -> Rep1 ZipList a # to1 :: Rep1 ZipList a -> ZipList a #
type Rep (ZipList a)	Since: base-4.7.0.0
Instance details Defined in Control.Applicative type Rep (ZipList a) = D1 (MetaData "ZipList" "Control.Applicative" "base" True) (C1 (MetaCons "ZipList" PrefixI True) (S1 (MetaSel (Just "getZipList") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 [a])))
type Rep1 ZipList	Since: base-4.7.0.0
Instance details Defined in Control.Applicative type Rep1 ZipList = D1 (MetaData "ZipList" "Control.Applicative" "base" True) (C1 (MetaCons "ZipList" PrefixI True) (S1 (MetaSel (Just "getZipList") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec1 [])))

newtype WrappedArrow (a :: Type -> Type -> Type) b c #

Constructors

WrapArrow
Fields unwrapArrow :: a b c

Instances

Generic1 (WrappedArrow a b :: Type -> Type)
Instance details Defined in Control.Applicative Associated Types type Rep1 (WrappedArrow a b) :: k -> Type # Methods from1 :: WrappedArrow a b a0 -> Rep1 (WrappedArrow a b) a0 # to1 :: Rep1 (WrappedArrow a b) a0 -> WrappedArrow a b a0 #
Arrow a => Functor (WrappedArrow a b)	Since: base-2.1
Instance details Defined in Control.Applicative Methods fmap :: (a0 -> b0) -> WrappedArrow a b a0 -> WrappedArrow a b b0 # (<$) :: a0 -> WrappedArrow a b b0 -> WrappedArrow a b a0 #
Arrow a => Applicative (WrappedArrow a b)	Since: base-2.1
Instance details Defined in Control.Applicative Methods pure :: a0 -> WrappedArrow a b a0 # (<>) :: WrappedArrow a b (a0 -> b0) -> WrappedArrow a b a0 -> WrappedArrow a b b0 # liftA2 :: (a0 -> b0 -> c) -> WrappedArrow a b a0 -> WrappedArrow a b b0 -> WrappedArrow a b c # (>) :: WrappedArrow a b a0 -> WrappedArrow a b b0 -> WrappedArrow a b b0 # (<*) :: WrappedArrow a b a0 -> WrappedArrow a b b0 -> WrappedArrow a b a0 #
(ArrowZero a, ArrowPlus a) => Alternative (WrappedArrow a b)	Since: base-2.1
Instance details Defined in Control.Applicative Methods empty :: WrappedArrow a b a0 # (<\|>) :: WrappedArrow a b a0 -> WrappedArrow a b a0 -> WrappedArrow a b a0 # some :: WrappedArrow a b a0 -> WrappedArrow a b [a0] # many :: WrappedArrow a b a0 -> WrappedArrow a b [a0] #
Generic (WrappedArrow a b c)
Instance details Defined in Control.Applicative Associated Types type Rep (WrappedArrow a b c) :: Type -> Type # Methods from :: WrappedArrow a b c -> Rep (WrappedArrow a b c) x # to :: Rep (WrappedArrow a b c) x -> WrappedArrow a b c #
type Rep1 (WrappedArrow a b :: Type -> Type)	Since: base-4.7.0.0
Instance details Defined in Control.Applicative type Rep1 (WrappedArrow a b :: Type -> Type) = D1 (MetaData "WrappedArrow" "Control.Applicative" "base" True) (C1 (MetaCons "WrapArrow" PrefixI True) (S1 (MetaSel (Just "unwrapArrow") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec1 (a b))))
type Rep (WrappedArrow a b c)	Since: base-4.7.0.0
Instance details Defined in Control.Applicative type Rep (WrappedArrow a b c) = D1 (MetaData "WrappedArrow" "Control.Applicative" "base" True) (C1 (MetaCons "WrapArrow" PrefixI True) (S1 (MetaSel (Just "unwrapArrow") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 (a b c))))

newtype WrappedMonad (m :: Type -> Type) a #

Constructors

WrapMonad
Fields unwrapMonad :: m a

Instances

Monad m => Monad (WrappedMonad m)	Since: base-4.7.0.0
Instance details Defined in Control.Applicative Methods (>>=) :: WrappedMonad m a -> (a -> WrappedMonad m b) -> WrappedMonad m b # (>>) :: WrappedMonad m a -> WrappedMonad m b -> WrappedMonad m b # return :: a -> WrappedMonad m a # fail :: String -> WrappedMonad m a #
Monad m => Functor (WrappedMonad m)	Since: base-2.1
Instance details Defined in Control.Applicative Methods fmap :: (a -> b) -> WrappedMonad m a -> WrappedMonad m b # (<$) :: a -> WrappedMonad m b -> WrappedMonad m a #
Monad m => Applicative (WrappedMonad m)	Since: base-2.1
Instance details Defined in Control.Applicative Methods pure :: a -> WrappedMonad m a # (<>) :: WrappedMonad m (a -> b) -> WrappedMonad m a -> WrappedMonad m b # liftA2 :: (a -> b -> c) -> WrappedMonad m a -> WrappedMonad m b -> WrappedMonad m c # (>) :: WrappedMonad m a -> WrappedMonad m b -> WrappedMonad m b # (<*) :: WrappedMonad m a -> WrappedMonad m b -> WrappedMonad m a #
MonadPlus m => Alternative (WrappedMonad m)	Since: base-2.1
Instance details Defined in Control.Applicative Methods empty :: WrappedMonad m a # (<\|>) :: WrappedMonad m a -> WrappedMonad m a -> WrappedMonad m a # some :: WrappedMonad m a -> WrappedMonad m [a] # many :: WrappedMonad m a -> WrappedMonad m [a] #
Generic1 (WrappedMonad m :: Type -> Type)
Instance details Defined in Control.Applicative Associated Types type Rep1 (WrappedMonad m) :: k -> Type # Methods from1 :: WrappedMonad m a -> Rep1 (WrappedMonad m) a # to1 :: Rep1 (WrappedMonad m) a -> WrappedMonad m a #
Generic (WrappedMonad m a)
Instance details Defined in Control.Applicative Associated Types type Rep (WrappedMonad m a) :: Type -> Type # Methods from :: WrappedMonad m a -> Rep (WrappedMonad m a) x # to :: Rep (WrappedMonad m a) x -> WrappedMonad m a #
type Rep1 (WrappedMonad m :: Type -> Type)	Since: base-4.7.0.0
Instance details Defined in Control.Applicative type Rep1 (WrappedMonad m :: Type -> Type) = D1 (MetaData "WrappedMonad" "Control.Applicative" "base" True) (C1 (MetaCons "WrapMonad" PrefixI True) (S1 (MetaSel (Just "unwrapMonad") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec1 m)))
type Rep (WrappedMonad m a)	Since: base-4.7.0.0
Instance details Defined in Control.Applicative type Rep (WrappedMonad m a) = D1 (MetaData "WrappedMonad" "Control.Applicative" "base" True) (C1 (MetaCons "WrapMonad" PrefixI True) (S1 (MetaSel (Just "unwrapMonad") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 (m a))))

forM :: (Traversable t, Monad m) => t a -> (a -> m b) -> m (t b) #

forM is mapM with its arguments flipped. For a version that ignores the results see forM_.

(>=>) :: Monad m => (a -> m b) -> (b -> m c) -> a -> m c infixr 1 #

Left-to-right composition of Kleisli arrows.

(<=<) :: Monad m => (b -> m c) -> (a -> m b) -> a -> m c infixr 1 #

Right-to-left composition of Kleisli arrows. (>=>), with the arguments flipped.

Note how this operator resembles function composition (.):

(.)   ::            (b ->   c) -> (a ->   b) -> a ->   c
(<=<) :: Monad m => (b -> m c) -> (a -> m b) -> a -> m c

forever :: Applicative f => f a -> f b #

Repeat an action indefinitely.

Examples

Expand

A common use of forever is to process input from network sockets, Handles, and channels (e.g. MVar and Chan).

For example, here is how we might implement an echo server, using forever both to listen for client connections on a network socket and to echo client input on client connection handles:

echoServer :: Socket -> IO ()
echoServer socket = forever $ do
  client <- accept socket
  forkFinally (echo client) (\_ -> hClose client)
  where
    echo :: Handle -> IO ()
    echo client = forever $
      hGetLine client >>= hPutStrLn client

mapAndUnzipM :: Applicative m => (a -> m (b, c)) -> [a] -> m ([b], [c]) #

The mapAndUnzipM function maps its first argument over a list, returning the result as a pair of lists. This function is mainly used with complicated data structures or a state-transforming monad.

zipWithM :: Applicative m => (a -> b -> m c) -> [a] -> [b] -> m [c] #

The zipWithM function generalizes zipWith to arbitrary applicative functors.

zipWithM_ :: Applicative m => (a -> b -> m c) -> [a] -> [b] -> m () #

zipWithM_ is the extension of zipWithM which ignores the final result.

foldM_ :: (Foldable t, Monad m) => (b -> a -> m b) -> b -> t a -> m () #

Like foldM, but discards the result.

replicateM :: Applicative m => Int -> m a -> m [a] #

replicateM n act performs the action n times, gathering the results.

replicateM_ :: Applicative m => Int -> m a -> m () #

Like replicateM, but discards the result.

(<$!>) :: Monad m => (a -> b) -> m a -> m b infixl 4 #

Strict version of <$>.

Since: base-4.8.0.0

mfilter :: MonadPlus m => (a -> Bool) -> m a -> m a #

Direct MonadPlus equivalent of filter.

Examples

Expand

The filter function is just mfilter specialized to the list monad:

filter = ( mfilter :: (a -> Bool) -> [a] -> [a] )

An example using mfilter with the Maybe monad:

>>> mfilter odd (Just 1)
Just 1
>>> mfilter odd (Just 2)
Nothing

vacuous :: Functor f => f Void -> f a #

If Void is uninhabited then any Functor that holds only values of type Void is holding no values.

Since: base-4.8.0.0

absurd :: Void -> a #

Since Void values logically don't exist, this witnesses the logical reasoning tool of "ex falso quodlibet".

>>> let x :: Either Void Int; x = Right 5
>>> :{
case x of
    Right r -> r
    Left l  -> absurd l
:}
5

Since: base-4.8.0.0

data Void #

Uninhabited data type

Since: base-4.8.0.0

Instances

Eq Void	Since: base-4.8.0.0
Instance details Defined in Data.Void Methods (==) :: Void -> Void -> Bool # (/=) :: Void -> Void -> Bool #
Data Void	Since: base-4.8.0.0
Instance details Defined in Data.Void Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Void -> c Void # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Void # toConstr :: Void -> Constr # dataTypeOf :: Void -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Void) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Void) # gmapT :: (forall b. Data b => b -> b) -> Void -> Void # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Void -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Void -> r # gmapQ :: (forall d. Data d => d -> u) -> Void -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Void -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Void -> m Void # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Void -> m Void # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Void -> m Void #
Ord Void	Since: base-4.8.0.0
Instance details Defined in Data.Void Methods compare :: Void -> Void -> Ordering # (<) :: Void -> Void -> Bool # (<=) :: Void -> Void -> Bool # (>) :: Void -> Void -> Bool # (>=) :: Void -> Void -> Bool # max :: Void -> Void -> Void # min :: Void -> Void -> Void #
Read Void	Reading a `Void` value is always a parse error, considering `Void` as a data type with no constructors. Since: base-4.8.0.0
Instance details Defined in Data.Void Methods readsPrec :: Int -> ReadS Void # readList :: ReadS [Void] # readPrec :: ReadPrec Void # readListPrec :: ReadPrec [Void] #
Show Void	Since: base-4.8.0.0
Instance details Defined in Data.Void Methods showsPrec :: Int -> Void -> ShowS # show :: Void -> String # showList :: [Void] -> ShowS #
Ix Void	Since: base-4.8.0.0
Instance details Defined in Data.Void Methods range :: (Void, Void) -> [Void] # index :: (Void, Void) -> Void -> Int # unsafeIndex :: (Void, Void) -> Void -> Int inRange :: (Void, Void) -> Void -> Bool # rangeSize :: (Void, Void) -> Int # unsafeRangeSize :: (Void, Void) -> Int
Generic Void
Instance details Defined in Data.Void Associated Types type Rep Void :: Type -> Type # Methods from :: Void -> Rep Void x # to :: Rep Void x -> Void #
Semigroup Void	Since: base-4.9.0.0
Instance details Defined in Data.Void Methods (<>) :: Void -> Void -> Void # sconcat :: NonEmpty Void -> Void # stimes :: Integral b => b -> Void -> Void #
NFData Void	Defined as `rnf = absurd`. Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Void -> () #
Hashable Void
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Void -> Int # hash :: Void -> Int #
ToJSON Void
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: Void -> Value # toEncoding :: Void -> Encoding # toJSONList :: [Void] -> Value # toEncodingList :: [Void] -> Encoding #
FromJSON Void
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser Void # parseJSONList :: Value -> Parser [Void] #
Exception Void	Since: base-4.8.0.0
Instance details Defined in Data.Void Methods toException :: Void -> SomeException # fromException :: SomeException -> Maybe Void # displayException :: Void -> String #
ShowErrorComponent Void
Instance details Defined in Text.Megaparsec.Error Methods showErrorComponent :: Void -> String # errorComponentLen :: Void -> Int #
type Rep Void	Since: base-4.8.0.0
Instance details Defined in Data.Void type Rep Void = D1 (MetaData "Void" "Data.Void" "base" False) (V1 :: Type -> Type)

option :: b -> (a -> b) -> Option a -> b #

Fold an Option case-wise, just like maybe.

mtimesDefault :: (Integral b, Monoid a) => b -> a -> a #

Repeat a value n times.

mtimesDefault n a = a <> a <> ... <> a  -- using <> (n-1) times

Implemented using stimes and mempty.

This is a suitable definition for an mtimes member of Monoid.

diff :: Semigroup m => m -> Endo m #

This lets you use a difference list of a Semigroup as a Monoid.

cycle1 :: Semigroup m => m -> m #

A generalization of cycle to an arbitrary Semigroup. May fail to terminate for some values in some semigroups.

newtype Min a #

Constructors

Min
Fields getMin :: a

Instances

Monad Min	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (>>=) :: Min a -> (a -> Min b) -> Min b # (>>) :: Min a -> Min b -> Min b # return :: a -> Min a # fail :: String -> Min a #
Functor Min	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fmap :: (a -> b) -> Min a -> Min b # (<$) :: a -> Min b -> Min a #
MonadFix Min	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mfix :: (a -> Min a) -> Min a #
Applicative Min	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods pure :: a -> Min a # (<>) :: Min (a -> b) -> Min a -> Min b # liftA2 :: (a -> b -> c) -> Min a -> Min b -> Min c # (>) :: Min a -> Min b -> Min b # (<*) :: Min a -> Min b -> Min a #
Foldable Min	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fold :: Monoid m => Min m -> m # foldMap :: Monoid m => (a -> m) -> Min a -> m # foldr :: (a -> b -> b) -> b -> Min a -> b # foldr' :: (a -> b -> b) -> b -> Min a -> b # foldl :: (b -> a -> b) -> b -> Min a -> b # foldl' :: (b -> a -> b) -> b -> Min a -> b # foldr1 :: (a -> a -> a) -> Min a -> a # foldl1 :: (a -> a -> a) -> Min a -> a # toList :: Min a -> [a] # null :: Min a -> Bool # length :: Min a -> Int # elem :: Eq a => a -> Min a -> Bool # maximum :: Ord a => Min a -> a # minimum :: Ord a => Min a -> a # sum :: Num a => Min a -> a # product :: Num a => Min a -> a #
Traversable Min	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods traverse :: Applicative f => (a -> f b) -> Min a -> f (Min b) # sequenceA :: Applicative f => Min (f a) -> f (Min a) # mapM :: Monad m => (a -> m b) -> Min a -> m (Min b) # sequence :: Monad m => Min (m a) -> m (Min a) #
ToJSON1 Min
Instance details Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a -> Value) -> ([a] -> Value) -> Min a -> Value # liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Min a] -> Value # liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Min a -> Encoding # liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Min a] -> Encoding #
FromJSON1 Min
Instance details Defined in Data.Aeson.Types.FromJSON Methods liftParseJSON :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser (Min a) # liftParseJSONList :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser [Min a] #
NFData1 Min	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Min a -> () #
Bounded a => Bounded (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods minBound :: Min a # maxBound :: Min a #
Enum a => Enum (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods succ :: Min a -> Min a # pred :: Min a -> Min a # toEnum :: Int -> Min a # fromEnum :: Min a -> Int # enumFrom :: Min a -> [Min a] # enumFromThen :: Min a -> Min a -> [Min a] # enumFromTo :: Min a -> Min a -> [Min a] # enumFromThenTo :: Min a -> Min a -> Min a -> [Min a] #
Eq a => Eq (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (==) :: Min a -> Min a -> Bool # (/=) :: Min a -> Min a -> Bool #
Data a => Data (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Min a -> c (Min a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Min a) # toConstr :: Min a -> Constr # dataTypeOf :: Min a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Min a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Min a)) # gmapT :: (forall b. Data b => b -> b) -> Min a -> Min a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Min a -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Min a -> r # gmapQ :: (forall d. Data d => d -> u) -> Min a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Min a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Min a -> m (Min a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Min a -> m (Min a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Min a -> m (Min a) #
Num a => Num (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (+) :: Min a -> Min a -> Min a # (-) :: Min a -> Min a -> Min a # (*) :: Min a -> Min a -> Min a # negate :: Min a -> Min a # abs :: Min a -> Min a # signum :: Min a -> Min a # fromInteger :: Integer -> Min a #
Ord a => Ord (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods compare :: Min a -> Min a -> Ordering # (<) :: Min a -> Min a -> Bool # (<=) :: Min a -> Min a -> Bool # (>) :: Min a -> Min a -> Bool # (>=) :: Min a -> Min a -> Bool # max :: Min a -> Min a -> Min a # min :: Min a -> Min a -> Min a #
Read a => Read (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods readsPrec :: Int -> ReadS (Min a) # readList :: ReadS [Min a] # readPrec :: ReadPrec (Min a) # readListPrec :: ReadPrec [Min a] #
Show a => Show (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods showsPrec :: Int -> Min a -> ShowS # show :: Min a -> String # showList :: [Min a] -> ShowS #
Generic (Min a)
Instance details Defined in Data.Semigroup Associated Types type Rep (Min a) :: Type -> Type # Methods from :: Min a -> Rep (Min a) x # to :: Rep (Min a) x -> Min a #
Ord a => Semigroup (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: Min a -> Min a -> Min a # sconcat :: NonEmpty (Min a) -> Min a # stimes :: Integral b => b -> Min a -> Min a #
(Ord a, Bounded a) => Monoid (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mempty :: Min a # mappend :: Min a -> Min a -> Min a # mconcat :: [Min a] -> Min a #
NFData a => NFData (Min a)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: Min a -> () #
Hashable a => Hashable (Min a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Min a -> Int # hash :: Min a -> Int #
ToJSON a => ToJSON (Min a)
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: Min a -> Value # toEncoding :: Min a -> Encoding # toJSONList :: [Min a] -> Value # toEncodingList :: [Min a] -> Encoding #
FromJSON a => FromJSON (Min a)
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser (Min a) # parseJSONList :: Value -> Parser [Min a] #
Generic1 Min
Instance details Defined in Data.Semigroup Associated Types type Rep1 Min :: k -> Type # Methods from1 :: Min a -> Rep1 Min a # to1 :: Rep1 Min a -> Min a #
type Rep (Min a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep (Min a) = D1 (MetaData "Min" "Data.Semigroup" "base" True) (C1 (MetaCons "Min" PrefixI True) (S1 (MetaSel (Just "getMin") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 a)))
type Rep1 Min	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep1 Min = D1 (MetaData "Min" "Data.Semigroup" "base" True) (C1 (MetaCons "Min" PrefixI True) (S1 (MetaSel (Just "getMin") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))

newtype Max a #

Constructors

Max
Fields getMax :: a

Instances

Monad Max	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (>>=) :: Max a -> (a -> Max b) -> Max b # (>>) :: Max a -> Max b -> Max b # return :: a -> Max a # fail :: String -> Max a #
Functor Max	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fmap :: (a -> b) -> Max a -> Max b # (<$) :: a -> Max b -> Max a #
MonadFix Max	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mfix :: (a -> Max a) -> Max a #
Applicative Max	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods pure :: a -> Max a # (<>) :: Max (a -> b) -> Max a -> Max b # liftA2 :: (a -> b -> c) -> Max a -> Max b -> Max c # (>) :: Max a -> Max b -> Max b # (<*) :: Max a -> Max b -> Max a #
Foldable Max	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fold :: Monoid m => Max m -> m # foldMap :: Monoid m => (a -> m) -> Max a -> m # foldr :: (a -> b -> b) -> b -> Max a -> b # foldr' :: (a -> b -> b) -> b -> Max a -> b # foldl :: (b -> a -> b) -> b -> Max a -> b # foldl' :: (b -> a -> b) -> b -> Max a -> b # foldr1 :: (a -> a -> a) -> Max a -> a # foldl1 :: (a -> a -> a) -> Max a -> a # toList :: Max a -> [a] # null :: Max a -> Bool # length :: Max a -> Int # elem :: Eq a => a -> Max a -> Bool # maximum :: Ord a => Max a -> a # minimum :: Ord a => Max a -> a # sum :: Num a => Max a -> a # product :: Num a => Max a -> a #
Traversable Max	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods traverse :: Applicative f => (a -> f b) -> Max a -> f (Max b) # sequenceA :: Applicative f => Max (f a) -> f (Max a) # mapM :: Monad m => (a -> m b) -> Max a -> m (Max b) # sequence :: Monad m => Max (m a) -> m (Max a) #
ToJSON1 Max
Instance details Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a -> Value) -> ([a] -> Value) -> Max a -> Value # liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Max a] -> Value # liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Max a -> Encoding # liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Max a] -> Encoding #
FromJSON1 Max
Instance details Defined in Data.Aeson.Types.FromJSON Methods liftParseJSON :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser (Max a) # liftParseJSONList :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser [Max a] #
NFData1 Max	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Max a -> () #
Bounded a => Bounded (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods minBound :: Max a # maxBound :: Max a #
Enum a => Enum (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods succ :: Max a -> Max a # pred :: Max a -> Max a # toEnum :: Int -> Max a # fromEnum :: Max a -> Int # enumFrom :: Max a -> [Max a] # enumFromThen :: Max a -> Max a -> [Max a] # enumFromTo :: Max a -> Max a -> [Max a] # enumFromThenTo :: Max a -> Max a -> Max a -> [Max a] #
Eq a => Eq (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (==) :: Max a -> Max a -> Bool # (/=) :: Max a -> Max a -> Bool #
Data a => Data (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Max a -> c (Max a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Max a) # toConstr :: Max a -> Constr # dataTypeOf :: Max a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Max a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Max a)) # gmapT :: (forall b. Data b => b -> b) -> Max a -> Max a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Max a -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Max a -> r # gmapQ :: (forall d. Data d => d -> u) -> Max a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Max a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Max a -> m (Max a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Max a -> m (Max a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Max a -> m (Max a) #
Num a => Num (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (+) :: Max a -> Max a -> Max a # (-) :: Max a -> Max a -> Max a # (*) :: Max a -> Max a -> Max a # negate :: Max a -> Max a # abs :: Max a -> Max a # signum :: Max a -> Max a # fromInteger :: Integer -> Max a #
Ord a => Ord (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods compare :: Max a -> Max a -> Ordering # (<) :: Max a -> Max a -> Bool # (<=) :: Max a -> Max a -> Bool # (>) :: Max a -> Max a -> Bool # (>=) :: Max a -> Max a -> Bool # max :: Max a -> Max a -> Max a # min :: Max a -> Max a -> Max a #
Read a => Read (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods readsPrec :: Int -> ReadS (Max a) # readList :: ReadS [Max a] # readPrec :: ReadPrec (Max a) # readListPrec :: ReadPrec [Max a] #
Show a => Show (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods showsPrec :: Int -> Max a -> ShowS # show :: Max a -> String # showList :: [Max a] -> ShowS #
Generic (Max a)
Instance details Defined in Data.Semigroup Associated Types type Rep (Max a) :: Type -> Type # Methods from :: Max a -> Rep (Max a) x # to :: Rep (Max a) x -> Max a #
Ord a => Semigroup (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: Max a -> Max a -> Max a # sconcat :: NonEmpty (Max a) -> Max a # stimes :: Integral b => b -> Max a -> Max a #
(Ord a, Bounded a) => Monoid (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mempty :: Max a # mappend :: Max a -> Max a -> Max a # mconcat :: [Max a] -> Max a #
NFData a => NFData (Max a)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: Max a -> () #
Hashable a => Hashable (Max a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Max a -> Int # hash :: Max a -> Int #
ToJSON a => ToJSON (Max a)
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: Max a -> Value # toEncoding :: Max a -> Encoding # toJSONList :: [Max a] -> Value # toEncodingList :: [Max a] -> Encoding #
FromJSON a => FromJSON (Max a)
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser (Max a) # parseJSONList :: Value -> Parser [Max a] #
Generic1 Max
Instance details Defined in Data.Semigroup Associated Types type Rep1 Max :: k -> Type # Methods from1 :: Max a -> Rep1 Max a # to1 :: Rep1 Max a -> Max a #
type Rep (Max a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep (Max a) = D1 (MetaData "Max" "Data.Semigroup" "base" True) (C1 (MetaCons "Max" PrefixI True) (S1 (MetaSel (Just "getMax") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 a)))
type Rep1 Max	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep1 Max = D1 (MetaData "Max" "Data.Semigroup" "base" True) (C1 (MetaCons "Max" PrefixI True) (S1 (MetaSel (Just "getMax") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))

data Arg a b #

Arg isn't itself a Semigroup in its own right, but it can be placed inside Min and Max to compute an arg min or arg max.

Constructors

Arg a b

Instances

Bitraversable Arg	Since: base-4.10.0.0
Instance details Defined in Data.Semigroup Methods bitraverse :: Applicative f => (a -> f c) -> (b -> f d) -> Arg a b -> f (Arg c d) #
Bifoldable Arg	Since: base-4.10.0.0
Instance details Defined in Data.Semigroup Methods bifold :: Monoid m => Arg m m -> m # bifoldMap :: Monoid m => (a -> m) -> (b -> m) -> Arg a b -> m # bifoldr :: (a -> c -> c) -> (b -> c -> c) -> c -> Arg a b -> c # bifoldl :: (c -> a -> c) -> (c -> b -> c) -> c -> Arg a b -> c #
Bifunctor Arg	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods bimap :: (a -> b) -> (c -> d) -> Arg a c -> Arg b d # first :: (a -> b) -> Arg a c -> Arg b c # second :: (b -> c) -> Arg a b -> Arg a c #
NFData2 Arg	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> Arg a b -> () #
Functor (Arg a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fmap :: (a0 -> b) -> Arg a a0 -> Arg a b # (<$) :: a0 -> Arg a b -> Arg a a0 #
Foldable (Arg a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fold :: Monoid m => Arg a m -> m # foldMap :: Monoid m => (a0 -> m) -> Arg a a0 -> m # foldr :: (a0 -> b -> b) -> b -> Arg a a0 -> b # foldr' :: (a0 -> b -> b) -> b -> Arg a a0 -> b # foldl :: (b -> a0 -> b) -> b -> Arg a a0 -> b # foldl' :: (b -> a0 -> b) -> b -> Arg a a0 -> b # foldr1 :: (a0 -> a0 -> a0) -> Arg a a0 -> a0 # foldl1 :: (a0 -> a0 -> a0) -> Arg a a0 -> a0 # toList :: Arg a a0 -> [a0] # null :: Arg a a0 -> Bool # length :: Arg a a0 -> Int # elem :: Eq a0 => a0 -> Arg a a0 -> Bool # maximum :: Ord a0 => Arg a a0 -> a0 # minimum :: Ord a0 => Arg a a0 -> a0 # sum :: Num a0 => Arg a a0 -> a0 # product :: Num a0 => Arg a a0 -> a0 #
Traversable (Arg a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods traverse :: Applicative f => (a0 -> f b) -> Arg a a0 -> f (Arg a b) # sequenceA :: Applicative f => Arg a (f a0) -> f (Arg a a0) # mapM :: Monad m => (a0 -> m b) -> Arg a a0 -> m (Arg a b) # sequence :: Monad m => Arg a (m a0) -> m (Arg a a0) #
NFData a => NFData1 (Arg a)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a0 -> ()) -> Arg a a0 -> () #
Generic1 (Arg a :: Type -> Type)
Instance details Defined in Data.Semigroup Associated Types type Rep1 (Arg a) :: k -> Type # Methods from1 :: Arg a a0 -> Rep1 (Arg a) a0 # to1 :: Rep1 (Arg a) a0 -> Arg a a0 #
Eq a => Eq (Arg a b)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (==) :: Arg a b -> Arg a b -> Bool # (/=) :: Arg a b -> Arg a b -> Bool #
(Data a, Data b) => Data (Arg a b)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods gfoldl :: (forall d b0. Data d => c (d -> b0) -> d -> c b0) -> (forall g. g -> c g) -> Arg a b -> c (Arg a b) # gunfold :: (forall b0 r. Data b0 => c (b0 -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Arg a b) # toConstr :: Arg a b -> Constr # dataTypeOf :: Arg a b -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Arg a b)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Arg a b)) # gmapT :: (forall b0. Data b0 => b0 -> b0) -> Arg a b -> Arg a b # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Arg a b -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Arg a b -> r # gmapQ :: (forall d. Data d => d -> u) -> Arg a b -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Arg a b -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Arg a b -> m (Arg a b) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Arg a b -> m (Arg a b) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Arg a b -> m (Arg a b) #
Ord a => Ord (Arg a b)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods compare :: Arg a b -> Arg a b -> Ordering # (<) :: Arg a b -> Arg a b -> Bool # (<=) :: Arg a b -> Arg a b -> Bool # (>) :: Arg a b -> Arg a b -> Bool # (>=) :: Arg a b -> Arg a b -> Bool # max :: Arg a b -> Arg a b -> Arg a b # min :: Arg a b -> Arg a b -> Arg a b #
(Read a, Read b) => Read (Arg a b)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods readsPrec :: Int -> ReadS (Arg a b) # readList :: ReadS [Arg a b] # readPrec :: ReadPrec (Arg a b) # readListPrec :: ReadPrec [Arg a b] #
(Show a, Show b) => Show (Arg a b)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods showsPrec :: Int -> Arg a b -> ShowS # show :: Arg a b -> String # showList :: [Arg a b] -> ShowS #
Generic (Arg a b)
Instance details Defined in Data.Semigroup Associated Types type Rep (Arg a b) :: Type -> Type # Methods from :: Arg a b -> Rep (Arg a b) x # to :: Rep (Arg a b) x -> Arg a b #
(NFData a, NFData b) => NFData (Arg a b)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: Arg a b -> () #
(Hashable a, Hashable b) => Hashable (Arg a b)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Arg a b -> Int # hash :: Arg a b -> Int #
type Rep1 (Arg a :: Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep1 (Arg a :: Type -> Type) = D1 (MetaData "Arg" "Data.Semigroup" "base" False) (C1 (MetaCons "Arg" PrefixI False) (S1 (MetaSel (Nothing :: Maybe Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 a) :*: S1 (MetaSel (Nothing :: Maybe Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))
type Rep (Arg a b)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep (Arg a b) = D1 (MetaData "Arg" "Data.Semigroup" "base" False) (C1 (MetaCons "Arg" PrefixI False) (S1 (MetaSel (Nothing :: Maybe Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 a) :*: S1 (MetaSel (Nothing :: Maybe Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 b)))

type ArgMin a b = Min (Arg a b) #

type ArgMax a b = Max (Arg a b) #

newtype First a #

Use Option (First a) to get the behavior of First from Data.Monoid.

Constructors

First
Fields getFirst :: a

Instances

Monad First	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (>>=) :: First a -> (a -> First b) -> First b # (>>) :: First a -> First b -> First b # return :: a -> First a # fail :: String -> First a #
Functor First	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fmap :: (a -> b) -> First a -> First b # (<$) :: a -> First b -> First a #
MonadFix First	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mfix :: (a -> First a) -> First a #
Applicative First	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods pure :: a -> First a # (<>) :: First (a -> b) -> First a -> First b # liftA2 :: (a -> b -> c) -> First a -> First b -> First c # (>) :: First a -> First b -> First b # (<*) :: First a -> First b -> First a #
Foldable First	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fold :: Monoid m => First m -> m # foldMap :: Monoid m => (a -> m) -> First a -> m # foldr :: (a -> b -> b) -> b -> First a -> b # foldr' :: (a -> b -> b) -> b -> First a -> b # foldl :: (b -> a -> b) -> b -> First a -> b # foldl' :: (b -> a -> b) -> b -> First a -> b # foldr1 :: (a -> a -> a) -> First a -> a # foldl1 :: (a -> a -> a) -> First a -> a # toList :: First a -> [a] # null :: First a -> Bool # length :: First a -> Int # elem :: Eq a => a -> First a -> Bool # maximum :: Ord a => First a -> a # minimum :: Ord a => First a -> a # sum :: Num a => First a -> a # product :: Num a => First a -> a #
Traversable First	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods traverse :: Applicative f => (a -> f b) -> First a -> f (First b) # sequenceA :: Applicative f => First (f a) -> f (First a) # mapM :: Monad m => (a -> m b) -> First a -> m (First b) # sequence :: Monad m => First (m a) -> m (First a) #
ToJSON1 First
Instance details Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a -> Value) -> ([a] -> Value) -> First a -> Value # liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [First a] -> Value # liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> First a -> Encoding # liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [First a] -> Encoding #
FromJSON1 First
Instance details Defined in Data.Aeson.Types.FromJSON Methods liftParseJSON :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser (First a) # liftParseJSONList :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser [First a] #
NFData1 First	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> First a -> () #
Bounded a => Bounded (First a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods minBound :: First a # maxBound :: First a #
Enum a => Enum (First a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods succ :: First a -> First a # pred :: First a -> First a # toEnum :: Int -> First a # fromEnum :: First a -> Int # enumFrom :: First a -> [First a] # enumFromThen :: First a -> First a -> [First a] # enumFromTo :: First a -> First a -> [First a] # enumFromThenTo :: First a -> First a -> First a -> [First a] #
Eq a => Eq (First a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (==) :: First a -> First a -> Bool # (/=) :: First a -> First a -> Bool #
Data a => Data (First a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> First a -> c (First a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (First a) # toConstr :: First a -> Constr # dataTypeOf :: First a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (First a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (First a)) # gmapT :: (forall b. Data b => b -> b) -> First a -> First a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> First a -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> First a -> r # gmapQ :: (forall d. Data d => d -> u) -> First a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> First a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> First a -> m (First a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> First a -> m (First a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> First a -> m (First a) #
Ord a => Ord (First a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods compare :: First a -> First a -> Ordering # (<) :: First a -> First a -> Bool # (<=) :: First a -> First a -> Bool # (>) :: First a -> First a -> Bool # (>=) :: First a -> First a -> Bool # max :: First a -> First a -> First a # min :: First a -> First a -> First a #
Read a => Read (First a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods readsPrec :: Int -> ReadS (First a) # readList :: ReadS [First a] # readPrec :: ReadPrec (First a) # readListPrec :: ReadPrec [First a] #
Show a => Show (First a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods showsPrec :: Int -> First a -> ShowS # show :: First a -> String # showList :: [First a] -> ShowS #
Generic (First a)
Instance details Defined in Data.Semigroup Associated Types type Rep (First a) :: Type -> Type # Methods from :: First a -> Rep (First a) x # to :: Rep (First a) x -> First a #
Semigroup (First a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: First a -> First a -> First a # sconcat :: NonEmpty (First a) -> First a # stimes :: Integral b => b -> First a -> First a #
NFData a => NFData (First a)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: First a -> () #
Hashable a => Hashable (First a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> First a -> Int # hash :: First a -> Int #
ToJSON a => ToJSON (First a)
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: First a -> Value # toEncoding :: First a -> Encoding # toJSONList :: [First a] -> Value # toEncodingList :: [First a] -> Encoding #
FromJSON a => FromJSON (First a)
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser (First a) # parseJSONList :: Value -> Parser [First a] #
Generic1 First
Instance details Defined in Data.Semigroup Associated Types type Rep1 First :: k -> Type # Methods from1 :: First a -> Rep1 First a # to1 :: Rep1 First a -> First a #
type Rep (First a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep (First a) = D1 (MetaData "First" "Data.Semigroup" "base" True) (C1 (MetaCons "First" PrefixI True) (S1 (MetaSel (Just "getFirst") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 a)))
type Rep1 First	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep1 First = D1 (MetaData "First" "Data.Semigroup" "base" True) (C1 (MetaCons "First" PrefixI True) (S1 (MetaSel (Just "getFirst") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))

newtype WrappedMonoid m #

Provide a Semigroup for an arbitrary Monoid.

NOTE: This is not needed anymore since Semigroup became a superclass of Monoid in base-4.11 and this newtype be deprecated at some point in the future.

Constructors

WrapMonoid
Fields unwrapMonoid :: m

Instances

ToJSON1 WrappedMonoid
Instance details Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a -> Value) -> ([a] -> Value) -> WrappedMonoid a -> Value # liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [WrappedMonoid a] -> Value # liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> WrappedMonoid a -> Encoding # liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [WrappedMonoid a] -> Encoding #
FromJSON1 WrappedMonoid
Instance details Defined in Data.Aeson.Types.FromJSON Methods liftParseJSON :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser (WrappedMonoid a) # liftParseJSONList :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser [WrappedMonoid a] #
NFData1 WrappedMonoid	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> WrappedMonoid a -> () #
Bounded m => Bounded (WrappedMonoid m)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods minBound :: WrappedMonoid m # maxBound :: WrappedMonoid m #
Enum a => Enum (WrappedMonoid a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods succ :: WrappedMonoid a -> WrappedMonoid a # pred :: WrappedMonoid a -> WrappedMonoid a # toEnum :: Int -> WrappedMonoid a # fromEnum :: WrappedMonoid a -> Int # enumFrom :: WrappedMonoid a -> [WrappedMonoid a] # enumFromThen :: WrappedMonoid a -> WrappedMonoid a -> [WrappedMonoid a] # enumFromTo :: WrappedMonoid a -> WrappedMonoid a -> [WrappedMonoid a] # enumFromThenTo :: WrappedMonoid a -> WrappedMonoid a -> WrappedMonoid a -> [WrappedMonoid a] #
Eq m => Eq (WrappedMonoid m)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (==) :: WrappedMonoid m -> WrappedMonoid m -> Bool # (/=) :: WrappedMonoid m -> WrappedMonoid m -> Bool #
Data m => Data (WrappedMonoid m)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> WrappedMonoid m -> c (WrappedMonoid m) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (WrappedMonoid m) # toConstr :: WrappedMonoid m -> Constr # dataTypeOf :: WrappedMonoid m -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (WrappedMonoid m)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (WrappedMonoid m)) # gmapT :: (forall b. Data b => b -> b) -> WrappedMonoid m -> WrappedMonoid m # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> WrappedMonoid m -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> WrappedMonoid m -> r # gmapQ :: (forall d. Data d => d -> u) -> WrappedMonoid m -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> WrappedMonoid m -> u # gmapM :: Monad m0 => (forall d. Data d => d -> m0 d) -> WrappedMonoid m -> m0 (WrappedMonoid m) # gmapMp :: MonadPlus m0 => (forall d. Data d => d -> m0 d) -> WrappedMonoid m -> m0 (WrappedMonoid m) # gmapMo :: MonadPlus m0 => (forall d. Data d => d -> m0 d) -> WrappedMonoid m -> m0 (WrappedMonoid m) #
Ord m => Ord (WrappedMonoid m)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods compare :: WrappedMonoid m -> WrappedMonoid m -> Ordering # (<) :: WrappedMonoid m -> WrappedMonoid m -> Bool # (<=) :: WrappedMonoid m -> WrappedMonoid m -> Bool # (>) :: WrappedMonoid m -> WrappedMonoid m -> Bool # (>=) :: WrappedMonoid m -> WrappedMonoid m -> Bool # max :: WrappedMonoid m -> WrappedMonoid m -> WrappedMonoid m # min :: WrappedMonoid m -> WrappedMonoid m -> WrappedMonoid m #
Read m => Read (WrappedMonoid m)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods readsPrec :: Int -> ReadS (WrappedMonoid m) # readList :: ReadS [WrappedMonoid m] # readPrec :: ReadPrec (WrappedMonoid m) # readListPrec :: ReadPrec [WrappedMonoid m] #
Show m => Show (WrappedMonoid m)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods showsPrec :: Int -> WrappedMonoid m -> ShowS # show :: WrappedMonoid m -> String # showList :: [WrappedMonoid m] -> ShowS #
Generic (WrappedMonoid m)
Instance details Defined in Data.Semigroup Associated Types type Rep (WrappedMonoid m) :: Type -> Type # Methods from :: WrappedMonoid m -> Rep (WrappedMonoid m) x # to :: Rep (WrappedMonoid m) x -> WrappedMonoid m #
Monoid m => Semigroup (WrappedMonoid m)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: WrappedMonoid m -> WrappedMonoid m -> WrappedMonoid m # sconcat :: NonEmpty (WrappedMonoid m) -> WrappedMonoid m # stimes :: Integral b => b -> WrappedMonoid m -> WrappedMonoid m #
Monoid m => Monoid (WrappedMonoid m)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mempty :: WrappedMonoid m # mappend :: WrappedMonoid m -> WrappedMonoid m -> WrappedMonoid m # mconcat :: [WrappedMonoid m] -> WrappedMonoid m #
NFData m => NFData (WrappedMonoid m)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: WrappedMonoid m -> () #
Hashable a => Hashable (WrappedMonoid a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> WrappedMonoid a -> Int # hash :: WrappedMonoid a -> Int #
ToJSON a => ToJSON (WrappedMonoid a)
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: WrappedMonoid a -> Value # toEncoding :: WrappedMonoid a -> Encoding # toJSONList :: [WrappedMonoid a] -> Value # toEncodingList :: [WrappedMonoid a] -> Encoding #
FromJSON a => FromJSON (WrappedMonoid a)
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser (WrappedMonoid a) # parseJSONList :: Value -> Parser [WrappedMonoid a] #
Generic1 WrappedMonoid
Instance details Defined in Data.Semigroup Associated Types type Rep1 WrappedMonoid :: k -> Type # Methods from1 :: WrappedMonoid a -> Rep1 WrappedMonoid a # to1 :: Rep1 WrappedMonoid a -> WrappedMonoid a #
type Rep (WrappedMonoid m)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep (WrappedMonoid m) = D1 (MetaData "WrappedMonoid" "Data.Semigroup" "base" True) (C1 (MetaCons "WrapMonoid" PrefixI True) (S1 (MetaSel (Just "unwrapMonoid") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 m)))
type Rep1 WrappedMonoid	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep1 WrappedMonoid = D1 (MetaData "WrappedMonoid" "Data.Semigroup" "base" True) (C1 (MetaCons "WrapMonoid" PrefixI True) (S1 (MetaSel (Just "unwrapMonoid") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))

newtype Option a #

Option is effectively Maybe with a better instance of Monoid, built off of an underlying Semigroup instead of an underlying Monoid.

Ideally, this type would not exist at all and we would just fix the Monoid instance of Maybe.

In GHC 8.4 and higher, the Monoid instance for Maybe has been corrected to lift a Semigroup instance instead of a Monoid instance. Consequently, this type is no longer useful. It will be marked deprecated in GHC 8.8 and removed in GHC 8.10.

Constructors

Option
Fields getOption :: Maybe a

Instances

Monad Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (>>=) :: Option a -> (a -> Option b) -> Option b # (>>) :: Option a -> Option b -> Option b # return :: a -> Option a # fail :: String -> Option a #
Functor Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fmap :: (a -> b) -> Option a -> Option b # (<$) :: a -> Option b -> Option a #
MonadFix Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mfix :: (a -> Option a) -> Option a #
Applicative Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods pure :: a -> Option a # (<>) :: Option (a -> b) -> Option a -> Option b # liftA2 :: (a -> b -> c) -> Option a -> Option b -> Option c # (>) :: Option a -> Option b -> Option b # (<*) :: Option a -> Option b -> Option a #
Foldable Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods fold :: Monoid m => Option m -> m # foldMap :: Monoid m => (a -> m) -> Option a -> m # foldr :: (a -> b -> b) -> b -> Option a -> b # foldr' :: (a -> b -> b) -> b -> Option a -> b # foldl :: (b -> a -> b) -> b -> Option a -> b # foldl' :: (b -> a -> b) -> b -> Option a -> b # foldr1 :: (a -> a -> a) -> Option a -> a # foldl1 :: (a -> a -> a) -> Option a -> a # toList :: Option a -> [a] # null :: Option a -> Bool # length :: Option a -> Int # elem :: Eq a => a -> Option a -> Bool # maximum :: Ord a => Option a -> a # minimum :: Ord a => Option a -> a # sum :: Num a => Option a -> a # product :: Num a => Option a -> a #
Traversable Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods traverse :: Applicative f => (a -> f b) -> Option a -> f (Option b) # sequenceA :: Applicative f => Option (f a) -> f (Option a) # mapM :: Monad m => (a -> m b) -> Option a -> m (Option b) # sequence :: Monad m => Option (m a) -> m (Option a) #
MonadPlus Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mzero :: Option a # mplus :: Option a -> Option a -> Option a #
Alternative Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods empty :: Option a # (<\|>) :: Option a -> Option a -> Option a # some :: Option a -> Option [a] # many :: Option a -> Option [a] #
ToJSON1 Option
Instance details Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a -> Value) -> ([a] -> Value) -> Option a -> Value # liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Option a] -> Value # liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Option a -> Encoding # liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Option a] -> Encoding #
FromJSON1 Option
Instance details Defined in Data.Aeson.Types.FromJSON Methods liftParseJSON :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser (Option a) # liftParseJSONList :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser [Option a] #
NFData1 Option	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Option a -> () #
(Selector s, GToJSON enc arity (K1 i (Maybe a) :: Type -> Type), KeyValuePair enc pairs, Monoid pairs) => RecordToPairs enc pairs arity (S1 s (K1 i (Option a) :: Type -> Type))
Instance details Defined in Data.Aeson.Types.ToJSON Methods recordToPairs :: Options -> ToArgs enc arity a0 -> S1 s (K1 i (Option a)) a0 -> pairs
(Selector s, FromJSON a) => FromRecord arity (S1 s (K1 i (Option a) :: Type -> Type))
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseRecord :: Options -> FromArgs arity a0 -> Object -> Parser (S1 s (K1 i (Option a)) a0)
Eq a => Eq (Option a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (==) :: Option a -> Option a -> Bool # (/=) :: Option a -> Option a -> Bool #
Data a => Data (Option a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Option a -> c (Option a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Option a) # toConstr :: Option a -> Constr # dataTypeOf :: Option a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Option a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Option a)) # gmapT :: (forall b. Data b => b -> b) -> Option a -> Option a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Option a -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Option a -> r # gmapQ :: (forall d. Data d => d -> u) -> Option a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Option a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Option a -> m (Option a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Option a -> m (Option a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Option a -> m (Option a) #
Ord a => Ord (Option a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods compare :: Option a -> Option a -> Ordering # (<) :: Option a -> Option a -> Bool # (<=) :: Option a -> Option a -> Bool # (>) :: Option a -> Option a -> Bool # (>=) :: Option a -> Option a -> Bool # max :: Option a -> Option a -> Option a # min :: Option a -> Option a -> Option a #
Read a => Read (Option a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods readsPrec :: Int -> ReadS (Option a) # readList :: ReadS [Option a] # readPrec :: ReadPrec (Option a) # readListPrec :: ReadPrec [Option a] #
Show a => Show (Option a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods showsPrec :: Int -> Option a -> ShowS # show :: Option a -> String # showList :: [Option a] -> ShowS #
Generic (Option a)
Instance details Defined in Data.Semigroup Associated Types type Rep (Option a) :: Type -> Type # Methods from :: Option a -> Rep (Option a) x # to :: Rep (Option a) x -> Option a #
Semigroup a => Semigroup (Option a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods (<>) :: Option a -> Option a -> Option a # sconcat :: NonEmpty (Option a) -> Option a # stimes :: Integral b => b -> Option a -> Option a #
Semigroup a => Monoid (Option a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods mempty :: Option a # mappend :: Option a -> Option a -> Option a # mconcat :: [Option a] -> Option a #
NFData a => NFData (Option a)	Since: deepseq-1.4.2.0
Instance details Defined in Control.DeepSeq Methods rnf :: Option a -> () #
Hashable a => Hashable (Option a)
Instance details Defined in Data.Hashable.Class Methods hashWithSalt :: Int -> Option a -> Int # hash :: Option a -> Int #
ToJSON a => ToJSON (Option a)
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: Option a -> Value # toEncoding :: Option a -> Encoding # toJSONList :: [Option a] -> Value # toEncodingList :: [Option a] -> Encoding #
FromJSON a => FromJSON (Option a)
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser (Option a) # parseJSONList :: Value -> Parser [Option a] #
Generic1 Option
Instance details Defined in Data.Semigroup Associated Types type Rep1 Option :: k -> Type # Methods from1 :: Option a -> Rep1 Option a # to1 :: Rep1 Option a -> Option a #
type Rep (Option a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep (Option a) = D1 (MetaData "Option" "Data.Semigroup" "base" True) (C1 (MetaCons "Option" PrefixI True) (S1 (MetaSel (Just "getOption") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 (Maybe a))))
type Rep1 Option	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup type Rep1 Option = D1 (MetaData "Option" "Data.Semigroup" "base" True) (C1 (MetaCons "Option" PrefixI True) (S1 (MetaSel (Just "getOption") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec1 Maybe)))

class Bifunctor (p :: Type -> Type -> Type) where #

A bifunctor is a type constructor that takes two type arguments and is a functor in both arguments. That is, unlike with Functor, a type constructor such as Either does not need to be partially applied for a Bifunctor instance, and the methods in this class permit mapping functions over the Left value or the Right value, or both at the same time.

Formally, the class Bifunctor represents a bifunctor from Hask -> Hask.

Intuitively it is a bifunctor where both the first and second arguments are covariant.

You can define a Bifunctor by either defining bimap or by defining both first and second.

If you supply bimap, you should ensure that:

bimap id id ≡ id

If you supply first and second, ensure:

first id ≡ id
second id ≡ id

If you supply both, you should also ensure:

bimap f g ≡ first f . second g

These ensure by parametricity:

bimap  (f . g) (h . i) ≡ bimap f h . bimap g i
first  (f . g) ≡ first  f . first  g
second (f . g) ≡ second f . second g

Since: base-4.8.0.0

Minimal complete definition

bimap | first, second

Methods

bimap :: (a -> b) -> (c -> d) -> p a c -> p b d #

Map over both arguments at the same time.

bimap f g ≡ first f . second g

Examples

Expand

>>> bimap toUpper (+1) ('j', 3)
('J',4)

>>> bimap toUpper (+1) (Left 'j')
Left 'J'

>>> bimap toUpper (+1) (Right 3)
Right 4

first :: (a -> b) -> p a c -> p b c #

Map covariantly over the first argument.

first f ≡ bimap f id

Examples

Expand

>>> first toUpper ('j', 3)
('J',3)

>>> first toUpper (Left 'j')
Left 'J'

second :: (b -> c) -> p a b -> p a c #

Map covariantly over the second argument.

second ≡ bimap id

Examples

Expand

>>> second (+1) ('j', 3)
('j',4)

>>> second (+1) (Right 3)
Right 4

Instances

Bifunctor Either	Since: base-4.8.0.0
Instance details Defined in Data.Bifunctor Methods bimap :: (a -> b) -> (c -> d) -> Either a c -> Either b d # first :: (a -> b) -> Either a c -> Either b c # second :: (b -> c) -> Either a b -> Either a c #
Bifunctor (,)	Since: base-4.8.0.0
Instance details Defined in Data.Bifunctor Methods bimap :: (a -> b) -> (c -> d) -> (a, c) -> (b, d) # first :: (a -> b) -> (a, c) -> (b, c) # second :: (b -> c) -> (a, b) -> (a, c) #
Bifunctor Arg	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup Methods bimap :: (a -> b) -> (c -> d) -> Arg a c -> Arg b d # first :: (a -> b) -> Arg a c -> Arg b c # second :: (b -> c) -> Arg a b -> Arg a c #
Bifunctor Product
Instance details Defined in Data.Aeson.Config.Types Methods bimap :: (a -> b) -> (c -> d) -> Product a c -> Product b d # first :: (a -> b) -> Product a c -> Product b c # second :: (b -> c) -> Product a b -> Product a c #
Bifunctor ((,,) x1)	Since: base-4.8.0.0
Instance details Defined in Data.Bifunctor Methods bimap :: (a -> b) -> (c -> d) -> (x1, a, c) -> (x1, b, d) # first :: (a -> b) -> (x1, a, c) -> (x1, b, c) # second :: (b -> c) -> (x1, a, b) -> (x1, a, c) #
Bifunctor (Const :: Type -> Type -> Type)	Since: base-4.8.0.0
Instance details Defined in Data.Bifunctor Methods bimap :: (a -> b) -> (c -> d) -> Const a c -> Const b d # first :: (a -> b) -> Const a c -> Const b c # second :: (b -> c) -> Const a b -> Const a c #
Bifunctor (Tagged :: Type -> Type -> Type)
Instance details Defined in Data.Tagged Methods bimap :: (a -> b) -> (c -> d) -> Tagged a c -> Tagged b d # first :: (a -> b) -> Tagged a c -> Tagged b c # second :: (b -> c) -> Tagged a b -> Tagged a c #
Bifunctor (K1 i :: Type -> Type -> Type)	Since: base-4.9.0.0
Instance details Defined in Data.Bifunctor Methods bimap :: (a -> b) -> (c -> d) -> K1 i a c -> K1 i b d # first :: (a -> b) -> K1 i a c -> K1 i b c # second :: (b -> c) -> K1 i a b -> K1 i a c #
Bifunctor ((,,,) x1 x2)	Since: base-4.8.0.0
Instance details Defined in Data.Bifunctor Methods bimap :: (a -> b) -> (c -> d) -> (x1, x2, a, c) -> (x1, x2, b, d) # first :: (a -> b) -> (x1, x2, a, c) -> (x1, x2, b, c) # second :: (b -> c) -> (x1, x2, a, b) -> (x1, x2, a, c) #
Bifunctor ((,,,,) x1 x2 x3)	Since: base-4.8.0.0
Instance details Defined in Data.Bifunctor Methods bimap :: (a -> b) -> (c -> d) -> (x1, x2, x3, a, c) -> (x1, x2, x3, b, d) # first :: (a -> b) -> (x1, x2, x3, a, c) -> (x1, x2, x3, b, c) # second :: (b -> c) -> (x1, x2, x3, a, b) -> (x1, x2, x3, a, c) #
Functor g => Bifunctor (Joker g :: Type -> Type -> Type)
Instance details Defined in Data.Bifunctor.Joker Methods bimap :: (a -> b) -> (c -> d) -> Joker g a c -> Joker g b d # first :: (a -> b) -> Joker g a c -> Joker g b c # second :: (b -> c) -> Joker g a b -> Joker g a c #
Functor f => Bifunctor (Clown f :: Type -> Type -> Type)
Instance details Defined in Data.Bifunctor.Clown Methods bimap :: (a -> b) -> (c -> d) -> Clown f a c -> Clown f b d # first :: (a -> b) -> Clown f a c -> Clown f b c # second :: (b -> c) -> Clown f a b -> Clown f a c #
Bifunctor ((,,,,,) x1 x2 x3 x4)	Since: base-4.8.0.0
Instance details Defined in Data.Bifunctor Methods bimap :: (a -> b) -> (c -> d) -> (x1, x2, x3, x4, a, c) -> (x1, x2, x3, x4, b, d) # first :: (a -> b) -> (x1, x2, x3, x4, a, c) -> (x1, x2, x3, x4, b, c) # second :: (b -> c) -> (x1, x2, x3, x4, a, b) -> (x1, x2, x3, x4, a, c) #
(Bifunctor p, Bifunctor q) => Bifunctor (Sum p q)
Instance details Defined in Data.Bifunctor.Sum Methods bimap :: (a -> b) -> (c -> d) -> Sum p q a c -> Sum p q b d # first :: (a -> b) -> Sum p q a c -> Sum p q b c # second :: (b -> c) -> Sum p q a b -> Sum p q a c #
(Bifunctor f, Bifunctor g) => Bifunctor (Product f g)
Instance details Defined in Data.Bifunctor.Product Methods bimap :: (a -> b) -> (c -> d) -> Product f g a c -> Product f g b d # first :: (a -> b) -> Product f g a c -> Product f g b c # second :: (b -> c) -> Product f g a b -> Product f g a c #
Bifunctor ((,,,,,,) x1 x2 x3 x4 x5)	Since: base-4.8.0.0
Instance details Defined in Data.Bifunctor Methods bimap :: (a -> b) -> (c -> d) -> (x1, x2, x3, x4, x5, a, c) -> (x1, x2, x3, x4, x5, b, d) # first :: (a -> b) -> (x1, x2, x3, x4, x5, a, c) -> (x1, x2, x3, x4, x5, b, c) # second :: (b -> c) -> (x1, x2, x3, x4, x5, a, b) -> (x1, x2, x3, x4, x5, a, c) #
(Functor f, Bifunctor p) => Bifunctor (Tannen f p)
Instance details Defined in Data.Bifunctor.Tannen Methods bimap :: (a -> b) -> (c -> d) -> Tannen f p a c -> Tannen f p b d # first :: (a -> b) -> Tannen f p a c -> Tannen f p b c # second :: (b -> c) -> Tannen f p a b -> Tannen f p a c #
(Bifunctor p, Functor f, Functor g) => Bifunctor (Biff p f g)
Instance details Defined in Data.Bifunctor.Biff Methods bimap :: (a -> b) -> (c -> d) -> Biff p f g a c -> Biff p f g b d # first :: (a -> b) -> Biff p f g a c -> Biff p f g b c # second :: (b -> c) -> Biff p f g a b -> Biff p f g a c #

errorBadArgument :: a #

Calls perror to indicate that there is a type error or similar in the given argument.

Since: base-4.7.0.0

errorMissingArgument :: a #

Calls perror to indicate that there is a missing argument in the argument list.

Since: base-4.7.0.0

errorShortFormat :: a #

Calls perror to indicate that the format string ended early.

Since: base-4.7.0.0

errorBadFormat :: Char -> a #

Calls perror to indicate an unknown format letter for a given type.

Since: base-4.7.0.0

perror :: String -> a #

Raises an error with a printf-specific prefix on the message string.

Since: base-4.7.0.0

formatRealFloat :: RealFloat a => a -> FieldFormatter #

Formatter for RealFloat values.

Since: base-4.7.0.0

formatInteger :: Integer -> FieldFormatter #

Formatter for Integer values.

Since: base-4.7.0.0

formatInt :: (Integral a, Bounded a) => a -> FieldFormatter #

Formatter for Int values.

Since: base-4.7.0.0

formatString :: IsChar a => [a] -> FieldFormatter #

Formatter for String values.

Since: base-4.7.0.0

formatChar :: Char -> FieldFormatter #

Formatter for Char values.

Since: base-4.7.0.0

vFmt :: Char -> FieldFormat -> FieldFormat #

Substitute a 'v' format character with the given default format character in the FieldFormat. A convenience for user-implemented types, which should support "%v".

Since: base-4.7.0.0

hPrintf :: HPrintfType r => Handle -> String -> r #

Similar to printf, except that output is via the specified Handle. The return type is restricted to (IO a).

printf :: PrintfType r => String -> r #

Format a variable number of arguments with the C-style formatting string.

>>> printf "%s, %d, %.4f" "hello" 123 pi
hello, 123, 3.1416

The return value is either String or (IO a) (which should be (IO '()'), but Haskell's type system makes this hard).

The format string consists of ordinary characters and conversion specifications, which specify how to format one of the arguments to printf in the output string. A format specification is introduced by the % character; this character can be self-escaped into the format string using %%. A format specification ends with a /format character/ that provides the primary information about how to format the value. The rest of the conversion specification is optional. In order, one may have flag characters, a width specifier, a precision specifier, and type-specific modifier characters.

Unlike C printf(3), the formatting of this printf is driven by the argument type; formatting is type specific. The types formatted by printf "out of the box" are:

Integral types, including Char
String
RealFloat types

printf is also extensible to support other types: see below.

A conversion specification begins with the character %, followed by zero or more of the following flags:

-      left adjust (default is right adjust)
+      always use a sign (+ or -) for signed conversions
space  leading space for positive numbers in signed conversions
0      pad with zeros rather than spaces
#      use an \"alternate form\": see below

When both flags are given, - overrides 0 and + overrides space. A negative width specifier in a * conversion is treated as positive but implies the left adjust flag.

The "alternate form" for unsigned radix conversions is as in C printf(3):

%o           prefix with a leading 0 if needed
%x           prefix with a leading 0x if nonzero
%X           prefix with a leading 0X if nonzero
%b           prefix with a leading 0b if nonzero
%[eEfFgG]    ensure that the number contains a decimal point

Any flags are followed optionally by a field width:

num    field width
*      as num, but taken from argument list

The field width is a minimum, not a maximum: it will be expanded as needed to avoid mutilating a value.

Any field width is followed optionally by a precision:

.num   precision
.      same as .0
.*     as num, but taken from argument list

Negative precision is taken as 0. The meaning of the precision depends on the conversion type.

Integral    minimum number of digits to show
RealFloat   number of digits after the decimal point
String      maximum number of characters

The precision for Integral types is accomplished by zero-padding. If both precision and zero-pad are given for an Integral field, the zero-pad is ignored.

Any precision is followed optionally for Integral types by a width modifier; the only use of this modifier being to set the implicit size of the operand for conversion of a negative operand to unsigned:

hh     Int8
h      Int16
l      Int32
ll     Int64
L      Int64

The specification ends with a format character:

c      character               Integral
d      decimal                 Integral
o      octal                   Integral
x      hexadecimal             Integral
X      hexadecimal             Integral
b      binary                  Integral
u      unsigned decimal        Integral
f      floating point          RealFloat
F      floating point          RealFloat
g      general format float    RealFloat
G      general format float    RealFloat
e      exponent format float   RealFloat
E      exponent format float   RealFloat
s      string                  String
v      default format          any type

The "%v" specifier is provided for all built-in types, and should be provided for user-defined type formatters as well. It picks a "best" representation for the given type. For the built-in types the "%v" specifier is converted as follows:

c      Char
u      other unsigned Integral
d      other signed Integral
g      RealFloat
s      String

Mismatch between the argument types and the format string, as well as any other syntactic or semantic errors in the format string, will cause an exception to be thrown at runtime.

Note that the formatting for RealFloat types is currently a bit different from that of C printf(3), conforming instead to showEFloat, showFFloat and showGFloat (and their alternate versions showFFloatAlt and showGFloatAlt). This is hard to fix: the fixed versions would format in a backward-incompatible way. In any case the Haskell behavior is generally more sensible than the C behavior. A brief summary of some key differences:

Haskell printf never uses the default "6-digit" precision used by C printf.
Haskell printf treats the "precision" specifier as indicating the number of digits after the decimal point.
Haskell printf prints the exponent of e-format numbers without a gratuitous plus sign, and with the minimum possible number of digits.
Haskell printf will place a zero after a decimal point when possible.

class PrintfType t #

The PrintfType class provides the variable argument magic for printf. Its implementation is intentionally not visible from this module. If you attempt to pass an argument of a type which is not an instance of this class to printf or hPrintf, then the compiler will report it as a missing instance of PrintfArg.

Minimal complete definition

spr

Instances

IsChar c => PrintfType [c]	Since: base-2.1
Instance details Defined in Text.Printf Methods spr :: String -> [UPrintf] -> [c]
a ~ () => PrintfType (IO a)	Since: base-4.7.0.0
Instance details Defined in Text.Printf Methods spr :: String -> [UPrintf] -> IO a
(PrintfArg a, PrintfType r) => PrintfType (a -> r)	Since: base-2.1
Instance details Defined in Text.Printf Methods spr :: String -> [UPrintf] -> a -> r

class HPrintfType t #

The HPrintfType class provides the variable argument magic for hPrintf. Its implementation is intentionally not visible from this module.

Minimal complete definition

hspr

Instances

a ~ () => HPrintfType (IO a)	Since: base-4.7.0.0
Instance details Defined in Text.Printf Methods hspr :: Handle -> String -> [UPrintf] -> IO a
(PrintfArg a, HPrintfType r) => HPrintfType (a -> r)	Since: base-2.1
Instance details Defined in Text.Printf Methods hspr :: Handle -> String -> [UPrintf] -> a -> r

class PrintfArg a where #

Typeclass of printf-formattable values. The formatArg method takes a value and a field format descriptor and either fails due to a bad descriptor or produces a ShowS as the result. The default parseFormat expects no modifiers: this is the normal case. Minimal instance: formatArg.

Minimal complete definition

formatArg

Methods

formatArg :: a -> FieldFormatter #

Since: base-4.7.0.0

parseFormat :: a -> ModifierParser #

Since: base-4.7.0.0

Instances

PrintfArg Char	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Char -> FieldFormatter # parseFormat :: Char -> ModifierParser #
PrintfArg Double	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Double -> FieldFormatter # parseFormat :: Double -> ModifierParser #
PrintfArg Float	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Float -> FieldFormatter # parseFormat :: Float -> ModifierParser #
PrintfArg Int	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Int -> FieldFormatter # parseFormat :: Int -> ModifierParser #
PrintfArg Int8	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Int8 -> FieldFormatter # parseFormat :: Int8 -> ModifierParser #
PrintfArg Int16	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Int16 -> FieldFormatter # parseFormat :: Int16 -> ModifierParser #
PrintfArg Int32	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Int32 -> FieldFormatter # parseFormat :: Int32 -> ModifierParser #
PrintfArg Int64	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Int64 -> FieldFormatter # parseFormat :: Int64 -> ModifierParser #
PrintfArg Integer	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Integer -> FieldFormatter # parseFormat :: Integer -> ModifierParser #
PrintfArg Natural	Since: base-4.8.0.0
Instance details Defined in Text.Printf Methods formatArg :: Natural -> FieldFormatter # parseFormat :: Natural -> ModifierParser #
PrintfArg Word	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Word -> FieldFormatter # parseFormat :: Word -> ModifierParser #
PrintfArg Word8	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Word8 -> FieldFormatter # parseFormat :: Word8 -> ModifierParser #
PrintfArg Word16	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Word16 -> FieldFormatter # parseFormat :: Word16 -> ModifierParser #
PrintfArg Word32	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Word32 -> FieldFormatter # parseFormat :: Word32 -> ModifierParser #
PrintfArg Word64	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: Word64 -> FieldFormatter # parseFormat :: Word64 -> ModifierParser #
IsChar c => PrintfArg [c]	Since: base-2.1
Instance details Defined in Text.Printf Methods formatArg :: [c] -> FieldFormatter # parseFormat :: [c] -> ModifierParser #

class IsChar c where #

This class, with only the one instance, is used as a workaround for the fact that String, as a concrete type, is not allowable as a typeclass instance. IsChar is exported for backward-compatibility.

Methods

toChar :: c -> Char #

Since: base-4.7.0.0

fromChar :: Char -> c #

Since: base-4.7.0.0

Instances

IsChar Char	Since: base-2.1
Instance details Defined in Text.Printf Methods toChar :: Char -> Char # fromChar :: Char -> Char #

data FormatAdjustment #

Whether to left-adjust or zero-pad a field. These are mutually exclusive, with LeftAdjust taking precedence.

Since: base-4.7.0.0

Constructors

LeftAdjust
ZeroPad

data FormatSign #

How to handle the sign of a numeric field. These are mutually exclusive, with SignPlus taking precedence.

Since: base-4.7.0.0

Constructors

SignPlus
SignSpace

data FieldFormat #

Description of field formatting for formatArg. See UNIX printf(3) for a description of how field formatting works.

Since: base-4.7.0.0

Constructors

FieldFormat

Fields

fmtWidth :: Maybe Int
Total width of the field.
fmtPrecision :: Maybe Int
Secondary field width specifier.
fmtAdjust :: Maybe FormatAdjustment
Kind of filling or padding to be done.
fmtSign :: Maybe FormatSign
Whether to insist on a plus sign for positive numbers.
fmtAlternate :: Bool
Indicates an "alternate format". See printf(3) for the details, which vary by argument spec.
fmtModifiers :: String
Characters that appeared immediately to the left of fmtChar in the format and were accepted by the type's parseFormat. Normally the empty string.
fmtChar :: Char
The format character printf was invoked with. formatArg should fail unless this character matches the type. It is normal to handle many different format characters for a single type.

data FormatParse #

The "format parser" walks over argument-type-specific modifier characters to find the primary format character. This is the type of its result.

Since: base-4.7.0.0

Constructors

FormatParse
Fields fpModifiers :: String Any modifiers found. fpChar :: Char Primary format character. fpRest :: String Rest of the format string.

type FieldFormatter = FieldFormat -> ShowS #

This is the type of a field formatter reified over its argument.

Since: base-4.7.0.0

type ModifierParser = String -> FormatParse #

Type of a function that will parse modifier characters from the format string.

Since: base-4.7.0.0

traceMarkerIO :: String -> IO () #

The traceMarkerIO function emits a marker to the eventlog, if eventlog profiling is available and enabled at runtime.

Compared to traceMarker, traceMarkerIO sequences the event with respect to other IO actions.

Since: base-4.7.0.0

traceMarker :: String -> a -> a #

The traceMarker function emits a marker to the eventlog, if eventlog profiling is available and enabled at runtime. The String is the name of the marker. The name is just used in the profiling tools to help you keep clear which marker is which.

This function is suitable for use in pure code. In an IO context use traceMarkerIO instead.

Note that when using GHC's SMP runtime, it is possible (but rare) to get duplicate events emitted if two CPUs simultaneously evaluate the same thunk that uses traceMarker.

Since: base-4.7.0.0

traceEventIO :: String -> IO () #

The traceEventIO function emits a message to the eventlog, if eventlog profiling is available and enabled at runtime.

Compared to traceEvent, traceEventIO sequences the event with respect to other IO actions.

Since: base-4.5.0.0

traceEvent :: String -> a -> a #

The traceEvent function behaves like trace with the difference that the message is emitted to the eventlog, if eventlog profiling is available and enabled at runtime.

It is suitable for use in pure code. In an IO context use traceEventIO instead.

Note that when using GHC's SMP runtime, it is possible (but rare) to get duplicate events emitted if two CPUs simultaneously evaluate the same thunk that uses traceEvent.

Since: base-4.5.0.0

traceStack :: String -> a -> a #

like trace, but additionally prints a call stack if one is available.

In the current GHC implementation, the call stack is only available if the program was compiled with -prof; otherwise traceStack behaves exactly like trace. Entries in the call stack correspond to SCC annotations, so it is a good idea to use -fprof-auto or -fprof-auto-calls to add SCC annotations automatically.

Since: base-4.5.0.0

traceShowM :: (Show a, Applicative f) => a -> f () #

Like traceM, but uses show on the argument to convert it to a String.

>>> :{
do
    x <- Just 3
    traceShowM x
    y <- pure 12
    traceShowM y
    pure (x*2 + y)
:}
3
12
Just 18

Since: base-4.7.0.0

traceM :: Applicative f => String -> f () #

Like trace but returning unit in an arbitrary Applicative context. Allows for convenient use in do-notation.

Note that the application of traceM is not an action in the Applicative context, as traceIO is in the IO type. While the fresh bindings in the following example will force the traceM expressions to be reduced every time the do-block is executed, traceM "not crashed" would only be reduced once, and the message would only be printed once. If your monad is in MonadIO, liftIO . traceIO may be a better option.

>>> :{
do
    x <- Just 3
    traceM ("x: " ++ show x)
    y <- pure 12
    traceM ("y: " ++ show y)
    pure (x*2 + y)
:}
x: 3
y: 12
Just 18

Since: base-4.7.0.0

traceShowId :: Show a => a -> a #

Like traceShow but returns the shown value instead of a third value.

>>> traceShowId (1+2+3, "hello" ++ "world")
(6,"helloworld")
(6,"helloworld")

Since: base-4.7.0.0

traceShow :: Show a => a -> b -> b #

Like trace, but uses show on the argument to convert it to a String.

This makes it convenient for printing the values of interesting variables or expressions inside a function. For example here we print the value of the variables x and y:

>>> let f x y = traceShow (x,y) (x + y) in f (1+2) 5
(3,5)
8

traceId :: String -> String #

Like trace but returns the message instead of a third value.

>>> traceId "hello"
"hello
hello"

Since: base-4.7.0.0

putTraceMsg :: String -> IO () #

traceIO :: String -> IO () #

The traceIO function outputs the trace message from the IO monad. This sequences the output with respect to other IO actions.

Since: base-4.5.0.0

isSubsequenceOf :: Eq a => [a] -> [a] -> Bool #

The isSubsequenceOf function takes two lists and returns True if all the elements of the first list occur, in order, in the second. The elements do not have to occur consecutively.

isSubsequenceOf x y is equivalent to elem x (subsequences y).

Examples

Expand

>>> isSubsequenceOf "GHC" "The Glorious Haskell Compiler"
True
>>> isSubsequenceOf ['a','d'..'z'] ['a'..'z']
True
>>> isSubsequenceOf [1..10] [10,9..0]
False

Since: base-4.8.0.0

foldMapDefault :: (Traversable t, Monoid m) => (a -> m) -> t a -> m #

This function may be used as a value for foldMap in a Foldable instance.

foldMapDefault f ≡ getConst . traverse (Const . f)

fmapDefault :: Traversable t => (a -> b) -> t a -> t b #

This function may be used as a value for fmap in a Functor instance, provided that traverse is defined. (Using fmapDefault with a Traversable instance defined only by sequenceA will result in infinite recursion.)

fmapDefault f ≡ runIdentity . traverse (Identity . f)

mapAccumR :: Traversable t => (a -> b -> (a, c)) -> a -> t b -> (a, t c) #

The mapAccumR function behaves like a combination of fmap and foldr; it applies a function to each element of a structure, passing an accumulating parameter from right to left, and returning a final value of this accumulator together with the new structure.

mapAccumL :: Traversable t => (a -> b -> (a, c)) -> a -> t b -> (a, t c) #

The mapAccumL function behaves like a combination of fmap and foldl; it applies a function to each element of a structure, passing an accumulating parameter from left to right, and returning a final value of this accumulator together with the new structure.

minimumBy :: Foldable t => (a -> a -> Ordering) -> t a -> a #

The least element of a non-empty structure with respect to the given comparison function.

maximumBy :: Foldable t => (a -> a -> Ordering) -> t a -> a #

The largest element of a non-empty structure with respect to the given comparison function.

asum :: (Foldable t, Alternative f) => t (f a) -> f a #

The sum of a collection of actions, generalizing concat.

asum [Just Hello, Nothing, Just World] Just Hello

sequenceA_ :: (Foldable t, Applicative f) => t (f a) -> f () #

Evaluate each action in the structure from left to right, and ignore the results. For a version that doesn't ignore the results see sequenceA.

foldlM :: (Foldable t, Monad m) => (b -> a -> m b) -> b -> t a -> m b #

Monadic fold over the elements of a structure, associating to the left, i.e. from left to right.

foldrM :: (Foldable t, Monad m) => (a -> b -> m b) -> b -> t a -> m b #

Monadic fold over the elements of a structure, associating to the right, i.e. from right to left.

stimesMonoid :: (Integral b, Monoid a) => b -> a -> a #

This is a valid definition of stimes for a Monoid.

Unlike the default definition of stimes, it is defined for 0 and so it should be preferred where possible.

stimesIdempotent :: Integral b => b -> a -> a #

This is a valid definition of stimes for an idempotent Semigroup.

When x <> x = x, this definition should be preferred, because it works in O(1) rather than O(log n).

newtype Dual a #

The dual of a Monoid, obtained by swapping the arguments of mappend.

>>> getDual (mappend (Dual "Hello") (Dual "World"))
"WorldHello"

Constructors

Dual
Fields getDual :: a

Instances

Monad Dual	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods (>>=) :: Dual a -> (a -> Dual b) -> Dual b # (>>) :: Dual a -> Dual b -> Dual b # return :: a -> Dual a # fail :: String -> Dual a #
Functor Dual	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods fmap :: (a -> b) -> Dual a -> Dual b # (<$) :: a -> Dual b -> Dual a #
Applicative Dual	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods pure :: a -> Dual a # (<>) :: Dual (a -> b) -> Dual a -> Dual b # liftA2 :: (a -> b -> c) -> Dual a -> Dual b -> Dual c # (>) :: Dual a -> Dual b -> Dual b # (<*) :: Dual a -> Dual b -> Dual a #
Foldable Dual	Since: base-4.8.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Dual m -> m # foldMap :: Monoid m => (a -> m) -> Dual a -> m # foldr :: (a -> b -> b) -> b -> Dual a -> b # foldr' :: (a -> b -> b) -> b -> Dual a -> b # foldl :: (b -> a -> b) -> b -> Dual a -> b # foldl' :: (b -> a -> b) -> b -> Dual a -> b # foldr1 :: (a -> a -> a) -> Dual a -> a # foldl1 :: (a -> a -> a) -> Dual a -> a # toList :: Dual a -> [a] # null :: Dual a -> Bool # length :: Dual a -> Int # elem :: Eq a => a -> Dual a -> Bool # maximum :: Ord a => Dual a -> a # minimum :: Ord a => Dual a -> a # sum :: Num a => Dual a -> a # product :: Num a => Dual a -> a #
Traversable Dual	Since: base-4.8.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Dual a -> f (Dual b) # sequenceA :: Applicative f => Dual (f a) -> f (Dual a) # mapM :: Monad m => (a -> m b) -> Dual a -> m (Dual b) # sequence :: Monad m => Dual (m a) -> m (Dual a) #
ToJSON1 Dual
Instance details Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a -> Value) -> ([a] -> Value) -> Dual a -> Value # liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Dual a] -> Value # liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Dual a -> Encoding # liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Dual a] -> Encoding #
FromJSON1 Dual
Instance details Defined in Data.Aeson.Types.FromJSON Methods liftParseJSON :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser (Dual a) # liftParseJSONList :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser [Dual a] #
NFData1 Dual	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Dual a -> () #
Bounded a => Bounded (Dual a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods minBound :: Dual a # maxBound :: Dual a #
Eq a => Eq (Dual a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods (==) :: Dual a -> Dual a -> Bool # (/=) :: Dual a -> Dual a -> Bool #
Data a => Data (Dual a)	Since: base-4.8.0.0
Instance details Defined in Data.Data Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Dual a -> c (Dual a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Dual a) # toConstr :: Dual a -> Constr # dataTypeOf :: Dual a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Dual a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Dual a)) # gmapT :: (forall b. Data b => b -> b) -> Dual a -> Dual a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Dual a -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Dual a -> r # gmapQ :: (forall d. Data d => d -> u) -> Dual a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Dual a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Dual a -> m (Dual a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Dual a -> m (Dual a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Dual a -> m (Dual a) #
Ord a => Ord (Dual a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods compare :: Dual a -> Dual a -> Ordering # (<) :: Dual a -> Dual a -> Bool # (<=) :: Dual a -> Dual a -> Bool # (>) :: Dual a -> Dual a -> Bool # (>=) :: Dual a -> Dual a -> Bool # max :: Dual a -> Dual a -> Dual a # min :: Dual a -> Dual a -> Dual a #
Read a => Read (Dual a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods readsPrec :: Int -> ReadS (Dual a) # readList :: ReadS [Dual a] # readPrec :: ReadPrec (Dual a) # readListPrec :: ReadPrec [Dual a] #
Show a => Show (Dual a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods showsPrec :: Int -> Dual a -> ShowS # show :: Dual a -> String # showList :: [Dual a] -> ShowS #
Generic (Dual a)
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep (Dual a) :: Type -> Type # Methods from :: Dual a -> Rep (Dual a) x # to :: Rep (Dual a) x -> Dual a #
Semigroup a => Semigroup (Dual a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup.Internal Methods (<>) :: Dual a -> Dual a -> Dual a # sconcat :: NonEmpty (Dual a) -> Dual a # stimes :: Integral b => b -> Dual a -> Dual a #
Monoid a => Monoid (Dual a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods mempty :: Dual a # mappend :: Dual a -> Dual a -> Dual a # mconcat :: [Dual a] -> Dual a #
NFData a => NFData (Dual a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Dual a -> () #
ToJSON a => ToJSON (Dual a)
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: Dual a -> Value # toEncoding :: Dual a -> Encoding # toJSONList :: [Dual a] -> Value # toEncodingList :: [Dual a] -> Encoding #
FromJSON a => FromJSON (Dual a)
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser (Dual a) # parseJSONList :: Value -> Parser [Dual a] #
Generic1 Dual
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep1 Dual :: k -> Type # Methods from1 :: Dual a -> Rep1 Dual a # to1 :: Rep1 Dual a -> Dual a #
type Rep (Dual a)	Since: base-4.7.0.0
Instance details Defined in Data.Semigroup.Internal type Rep (Dual a) = D1 (MetaData "Dual" "Data.Semigroup.Internal" "base" True) (C1 (MetaCons "Dual" PrefixI True) (S1 (MetaSel (Just "getDual") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 a)))
type Rep1 Dual	Since: base-4.7.0.0
Instance details Defined in Data.Semigroup.Internal type Rep1 Dual = D1 (MetaData "Dual" "Data.Semigroup.Internal" "base" True) (C1 (MetaCons "Dual" PrefixI True) (S1 (MetaSel (Just "getDual") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))

newtype Endo a #

The monoid of endomorphisms under composition.

>>> let computation = Endo ("Hello, " ++) <> Endo (++ "!")
>>> appEndo computation "Haskell"
"Hello, Haskell!"

Constructors

Endo
Fields appEndo :: a -> a

Instances

Generic (Endo a)
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep (Endo a) :: Type -> Type # Methods from :: Endo a -> Rep (Endo a) x # to :: Rep (Endo a) x -> Endo a #
Semigroup (Endo a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup.Internal Methods (<>) :: Endo a -> Endo a -> Endo a # sconcat :: NonEmpty (Endo a) -> Endo a # stimes :: Integral b => b -> Endo a -> Endo a #
Monoid (Endo a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods mempty :: Endo a # mappend :: Endo a -> Endo a -> Endo a # mconcat :: [Endo a] -> Endo a #
type Rep (Endo a)	Since: base-4.7.0.0
Instance details Defined in Data.Semigroup.Internal type Rep (Endo a) = D1 (MetaData "Endo" "Data.Semigroup.Internal" "base" True) (C1 (MetaCons "Endo" PrefixI True) (S1 (MetaSel (Just "appEndo") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 (a -> a))))

newtype Sum a #

Monoid under addition.

>>> getSum (Sum 1 <> Sum 2 <> mempty)
3

Constructors

Sum
Fields getSum :: a

Instances

Monad Sum	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods (>>=) :: Sum a -> (a -> Sum b) -> Sum b # (>>) :: Sum a -> Sum b -> Sum b # return :: a -> Sum a # fail :: String -> Sum a #
Functor Sum	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods fmap :: (a -> b) -> Sum a -> Sum b # (<$) :: a -> Sum b -> Sum a #
Applicative Sum	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods pure :: a -> Sum a # (<>) :: Sum (a -> b) -> Sum a -> Sum b # liftA2 :: (a -> b -> c) -> Sum a -> Sum b -> Sum c # (>) :: Sum a -> Sum b -> Sum b # (<*) :: Sum a -> Sum b -> Sum a #
Foldable Sum	Since: base-4.8.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Sum m -> m # foldMap :: Monoid m => (a -> m) -> Sum a -> m # foldr :: (a -> b -> b) -> b -> Sum a -> b # foldr' :: (a -> b -> b) -> b -> Sum a -> b # foldl :: (b -> a -> b) -> b -> Sum a -> b # foldl' :: (b -> a -> b) -> b -> Sum a -> b # foldr1 :: (a -> a -> a) -> Sum a -> a # foldl1 :: (a -> a -> a) -> Sum a -> a # toList :: Sum a -> [a] # null :: Sum a -> Bool # length :: Sum a -> Int # elem :: Eq a => a -> Sum a -> Bool # maximum :: Ord a => Sum a -> a # minimum :: Ord a => Sum a -> a # sum :: Num a => Sum a -> a # product :: Num a => Sum a -> a #
Traversable Sum	Since: base-4.8.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Sum a -> f (Sum b) # sequenceA :: Applicative f => Sum (f a) -> f (Sum a) # mapM :: Monad m => (a -> m b) -> Sum a -> m (Sum b) # sequence :: Monad m => Sum (m a) -> m (Sum a) #
NFData1 Sum	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Sum a -> () #
Bounded a => Bounded (Sum a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods minBound :: Sum a # maxBound :: Sum a #
Eq a => Eq (Sum a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods (==) :: Sum a -> Sum a -> Bool # (/=) :: Sum a -> Sum a -> Bool #
Data a => Data (Sum a)	Since: base-4.8.0.0
Instance details Defined in Data.Data Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Sum a -> c (Sum a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Sum a) # toConstr :: Sum a -> Constr # dataTypeOf :: Sum a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Sum a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Sum a)) # gmapT :: (forall b. Data b => b -> b) -> Sum a -> Sum a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Sum a -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Sum a -> r # gmapQ :: (forall d. Data d => d -> u) -> Sum a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Sum a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Sum a -> m (Sum a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Sum a -> m (Sum a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Sum a -> m (Sum a) #
Num a => Num (Sum a)	Since: base-4.7.0.0
Instance details Defined in Data.Semigroup.Internal Methods (+) :: Sum a -> Sum a -> Sum a # (-) :: Sum a -> Sum a -> Sum a # (*) :: Sum a -> Sum a -> Sum a # negate :: Sum a -> Sum a # abs :: Sum a -> Sum a # signum :: Sum a -> Sum a # fromInteger :: Integer -> Sum a #
Ord a => Ord (Sum a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods compare :: Sum a -> Sum a -> Ordering # (<) :: Sum a -> Sum a -> Bool # (<=) :: Sum a -> Sum a -> Bool # (>) :: Sum a -> Sum a -> Bool # (>=) :: Sum a -> Sum a -> Bool # max :: Sum a -> Sum a -> Sum a # min :: Sum a -> Sum a -> Sum a #
Read a => Read (Sum a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods readsPrec :: Int -> ReadS (Sum a) # readList :: ReadS [Sum a] # readPrec :: ReadPrec (Sum a) # readListPrec :: ReadPrec [Sum a] #
Show a => Show (Sum a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods showsPrec :: Int -> Sum a -> ShowS # show :: Sum a -> String # showList :: [Sum a] -> ShowS #
Generic (Sum a)
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep (Sum a) :: Type -> Type # Methods from :: Sum a -> Rep (Sum a) x # to :: Rep (Sum a) x -> Sum a #
Num a => Semigroup (Sum a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup.Internal Methods (<>) :: Sum a -> Sum a -> Sum a # sconcat :: NonEmpty (Sum a) -> Sum a # stimes :: Integral b => b -> Sum a -> Sum a #
Num a => Monoid (Sum a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods mempty :: Sum a # mappend :: Sum a -> Sum a -> Sum a # mconcat :: [Sum a] -> Sum a #
NFData a => NFData (Sum a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Sum a -> () #
Generic1 Sum
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep1 Sum :: k -> Type # Methods from1 :: Sum a -> Rep1 Sum a # to1 :: Rep1 Sum a -> Sum a #
type Rep (Sum a)	Since: base-4.7.0.0
Instance details Defined in Data.Semigroup.Internal type Rep (Sum a) = D1 (MetaData "Sum" "Data.Semigroup.Internal" "base" True) (C1 (MetaCons "Sum" PrefixI True) (S1 (MetaSel (Just "getSum") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 a)))
type Rep1 Sum	Since: base-4.7.0.0
Instance details Defined in Data.Semigroup.Internal type Rep1 Sum = D1 (MetaData "Sum" "Data.Semigroup.Internal" "base" True) (C1 (MetaCons "Sum" PrefixI True) (S1 (MetaSel (Just "getSum") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))

newtype Product a #

Monoid under multiplication.

>>> getProduct (Product 3 <> Product 4 <> mempty)
12

Constructors

Product
Fields getProduct :: a

Instances

Monad Product	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods (>>=) :: Product a -> (a -> Product b) -> Product b # (>>) :: Product a -> Product b -> Product b # return :: a -> Product a # fail :: String -> Product a #
Functor Product	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods fmap :: (a -> b) -> Product a -> Product b # (<$) :: a -> Product b -> Product a #
Applicative Product	Since: base-4.8.0.0
Instance details Defined in Data.Semigroup.Internal Methods pure :: a -> Product a # (<>) :: Product (a -> b) -> Product a -> Product b # liftA2 :: (a -> b -> c) -> Product a -> Product b -> Product c # (>) :: Product a -> Product b -> Product b # (<*) :: Product a -> Product b -> Product a #
Foldable Product	Since: base-4.8.0.0
Instance details Defined in Data.Foldable Methods fold :: Monoid m => Product m -> m # foldMap :: Monoid m => (a -> m) -> Product a -> m # foldr :: (a -> b -> b) -> b -> Product a -> b # foldr' :: (a -> b -> b) -> b -> Product a -> b # foldl :: (b -> a -> b) -> b -> Product a -> b # foldl' :: (b -> a -> b) -> b -> Product a -> b # foldr1 :: (a -> a -> a) -> Product a -> a # foldl1 :: (a -> a -> a) -> Product a -> a # toList :: Product a -> [a] # null :: Product a -> Bool # length :: Product a -> Int # elem :: Eq a => a -> Product a -> Bool # maximum :: Ord a => Product a -> a # minimum :: Ord a => Product a -> a # sum :: Num a => Product a -> a # product :: Num a => Product a -> a #
Traversable Product	Since: base-4.8.0.0
Instance details Defined in Data.Traversable Methods traverse :: Applicative f => (a -> f b) -> Product a -> f (Product b) # sequenceA :: Applicative f => Product (f a) -> f (Product a) # mapM :: Monad m => (a -> m b) -> Product a -> m (Product b) # sequence :: Monad m => Product (m a) -> m (Product a) #
NFData1 Product	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Product a -> () #
Bounded a => Bounded (Product a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods minBound :: Product a # maxBound :: Product a #
Eq a => Eq (Product a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods (==) :: Product a -> Product a -> Bool # (/=) :: Product a -> Product a -> Bool #
Data a => Data (Product a)	Since: base-4.8.0.0
Instance details Defined in Data.Data Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Product a -> c (Product a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Product a) # toConstr :: Product a -> Constr # dataTypeOf :: Product a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Product a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Product a)) # gmapT :: (forall b. Data b => b -> b) -> Product a -> Product a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Product a -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Product a -> r # gmapQ :: (forall d. Data d => d -> u) -> Product a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Product a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Product a -> m (Product a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Product a -> m (Product a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Product a -> m (Product a) #
Num a => Num (Product a)	Since: base-4.7.0.0
Instance details Defined in Data.Semigroup.Internal Methods (+) :: Product a -> Product a -> Product a # (-) :: Product a -> Product a -> Product a # (*) :: Product a -> Product a -> Product a # negate :: Product a -> Product a # abs :: Product a -> Product a # signum :: Product a -> Product a # fromInteger :: Integer -> Product a #
Ord a => Ord (Product a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods compare :: Product a -> Product a -> Ordering # (<) :: Product a -> Product a -> Bool # (<=) :: Product a -> Product a -> Bool # (>) :: Product a -> Product a -> Bool # (>=) :: Product a -> Product a -> Bool # max :: Product a -> Product a -> Product a # min :: Product a -> Product a -> Product a #
Read a => Read (Product a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods readsPrec :: Int -> ReadS (Product a) # readList :: ReadS [Product a] # readPrec :: ReadPrec (Product a) # readListPrec :: ReadPrec [Product a] #
Show a => Show (Product a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods showsPrec :: Int -> Product a -> ShowS # show :: Product a -> String # showList :: [Product a] -> ShowS #
Generic (Product a)
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep (Product a) :: Type -> Type # Methods from :: Product a -> Rep (Product a) x # to :: Rep (Product a) x -> Product a #
Num a => Semigroup (Product a)	Since: base-4.9.0.0
Instance details Defined in Data.Semigroup.Internal Methods (<>) :: Product a -> Product a -> Product a # sconcat :: NonEmpty (Product a) -> Product a # stimes :: Integral b => b -> Product a -> Product a #
Num a => Monoid (Product a)	Since: base-2.1
Instance details Defined in Data.Semigroup.Internal Methods mempty :: Product a # mappend :: Product a -> Product a -> Product a # mconcat :: [Product a] -> Product a #
NFData a => NFData (Product a)	Since: deepseq-1.4.0.0
Instance details Defined in Control.DeepSeq Methods rnf :: Product a -> () #
Generic1 Product
Instance details Defined in Data.Semigroup.Internal Associated Types type Rep1 Product :: k -> Type # Methods from1 :: Product a -> Rep1 Product a # to1 :: Rep1 Product a -> Product a #
type Rep (Product a)	Since: base-4.7.0.0
Instance details Defined in Data.Semigroup.Internal type Rep (Product a) = D1 (MetaData "Product" "Data.Semigroup.Internal" "base" True) (C1 (MetaCons "Product" PrefixI True) (S1 (MetaSel (Just "getProduct") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 a)))
type Rep1 Product	Since: base-4.7.0.0
Instance details Defined in Data.Semigroup.Internal type Rep1 Product = D1 (MetaData "Product" "Data.Semigroup.Internal" "base" True) (C1 (MetaCons "Product" PrefixI True) (S1 (MetaSel (Just "getProduct") NoSourceUnpackedness NoSourceStrictness DecidedLazy) Par1))

sortOn :: Ord b => (a -> b) -> [a] -> [a] #

Sort a list by comparing the results of a key function applied to each element. sortOn f is equivalent to sortBy (comparing f), but has the performance advantage of only evaluating f once for each element in the input list. This is called the decorate-sort-undecorate paradigm, or Schwartzian transform.

Elements are arranged from from lowest to highest, keeping duplicates in the order they appeared in the input.

>>> sortOn fst [(2, "world"), (4, "!"), (1, "Hello")]
[(1,"Hello"),(2,"world"),(4,"!")]

Since: base-4.8.0.0

permutations :: [a] -> [[a]] #

The permutations function returns the list of all permutations of the argument.

>>> permutations "abc"
["abc","bac","cba","bca","cab","acb"]

subsequences :: [a] -> [[a]] #

The subsequences function returns the list of all subsequences of the argument.

>>> subsequences "abc"
["","a","b","ab","c","ac","bc","abc"]

tails :: [a] -> [[a]] #

The tails function returns all final segments of the argument, longest first. For example,

>>> tails "abc"
["abc","bc","c",""]

Note that tails has the following strictness property: tails _|_ = _|_ : _|_

inits :: [a] -> [[a]] #

The inits function returns all initial segments of the argument, shortest first. For example,

>>> inits "abc"
["","a","ab","abc"]

Note that inits has the following strictness property: inits (xs ++ _|_) = inits xs ++ _|_

In particular, inits _|_ = [] : _|_

groupBy :: (a -> a -> Bool) -> [a] -> [[a]] #

The groupBy function is the non-overloaded version of group.

group :: Eq a => [a] -> [[a]] #

The group function takes a list and returns a list of lists such that the concatenation of the result is equal to the argument. Moreover, each sublist in the result contains only equal elements. For example,

>>> group "Mississippi"
["M","i","ss","i","ss","i","pp","i"]

It is a special case of groupBy, which allows the programmer to supply their own equality test.

deleteFirstsBy :: (a -> a -> Bool) -> [a] -> [a] -> [a] #

The deleteFirstsBy function takes a predicate and two lists and returns the first list with the first occurrence of each element of the second list removed.

unzip7 :: [(a, b, c, d, e, f, g)] -> ([a], [b], [c], [d], [e], [f], [g]) #

The unzip7 function takes a list of seven-tuples and returns seven lists, analogous to unzip.

unzip6 :: [(a, b, c, d, e, f)] -> ([a], [b], [c], [d], [e], [f]) #

The unzip6 function takes a list of six-tuples and returns six lists, analogous to unzip.

unzip5 :: [(a, b, c, d, e)] -> ([a], [b], [c], [d], [e]) #

The unzip5 function takes a list of five-tuples and returns five lists, analogous to unzip.

unzip4 :: [(a, b, c, d)] -> ([a], [b], [c], [d]) #

The unzip4 function takes a list of quadruples and returns four lists, analogous to unzip.

zipWith7 :: (a -> b -> c -> d -> e -> f -> g -> h) -> [a] -> [b] -> [c] -> [d] -> [e] -> [f] -> [g] -> [h] #

The zipWith7 function takes a function which combines seven elements, as well as seven lists and returns a list of their point-wise combination, analogous to zipWith.

zipWith6 :: (a -> b -> c -> d -> e -> f -> g) -> [a] -> [b] -> [c] -> [d] -> [e] -> [f] -> [g] #

The zipWith6 function takes a function which combines six elements, as well as six lists and returns a list of their point-wise combination, analogous to zipWith.

zipWith5 :: (a -> b -> c -> d -> e -> f) -> [a] -> [b] -> [c] -> [d] -> [e] -> [f] #

The zipWith5 function takes a function which combines five elements, as well as five lists and returns a list of their point-wise combination, analogous to zipWith.

zipWith4 :: (a -> b -> c -> d -> e) -> [a] -> [b] -> [c] -> [d] -> [e] #

The zipWith4 function takes a function which combines four elements, as well as four lists and returns a list of their point-wise combination, analogous to zipWith.

zip7 :: [a] -> [b] -> [c] -> [d] -> [e] -> [f] -> [g] -> [(a, b, c, d, e, f, g)] #

The zip7 function takes seven lists and returns a list of seven-tuples, analogous to zip.

zip6 :: [a] -> [b] -> [c] -> [d] -> [e] -> [f] -> [(a, b, c, d, e, f)] #

The zip6 function takes six lists and returns a list of six-tuples, analogous to zip.

zip5 :: [a] -> [b] -> [c] -> [d] -> [e] -> [(a, b, c, d, e)] #

The zip5 function takes five lists and returns a list of five-tuples, analogous to zip.

zip4 :: [a] -> [b] -> [c] -> [d] -> [(a, b, c, d)] #

The zip4 function takes four lists and returns a list of quadruples, analogous to zip.

genericReplicate :: Integral i => i -> a -> [a] #

The genericReplicate function is an overloaded version of replicate, which accepts any Integral value as the number of repetitions to make.

genericIndex :: Integral i => [a] -> i -> a #

The genericIndex function is an overloaded version of !!, which accepts any Integral value as the index.

genericSplitAt :: Integral i => i -> [a] -> ([a], [a]) #

The genericSplitAt function is an overloaded version of splitAt, which accepts any Integral value as the position at which to split.

genericDrop :: Integral i => i -> [a] -> [a] #

The genericDrop function is an overloaded version of drop, which accepts any Integral value as the number of elements to drop.

genericTake :: Integral i => i -> [a] -> [a] #

The genericTake function is an overloaded version of take, which accepts any Integral value as the number of elements to take.

genericLength :: Num i => [a] -> i #

The genericLength function is an overloaded version of length. In particular, instead of returning an Int, it returns any type which is an instance of Num. It is, however, less efficient than length.

insertBy :: (a -> a -> Ordering) -> a -> [a] -> [a] #

The non-overloaded version of insert.

insert :: Ord a => a -> [a] -> [a] #

The insert function takes an element and a list and inserts the element into the list at the first position where it is less than or equal to the next element. In particular, if the list is sorted before the call, the result will also be sorted. It is a special case of insertBy, which allows the programmer to supply their own comparison function.

>>> insert 4 [1,2,3,5,6,7]
[1,2,3,4,5,6,7]

partition :: (a -> Bool) -> [a] -> ([a], [a]) #

The partition function takes a predicate a list and returns the pair of lists of elements which do and do not satisfy the predicate, respectively; i.e.,

partition p xs == (filter p xs, filter (not . p) xs)

>>> partition (`elem` "aeiou") "Hello World!"
("eoo","Hll Wrld!")

transpose :: [[a]] -> [[a]] #

The transpose function transposes the rows and columns of its argument. For example,

>>> transpose [[1,2,3],[4,5,6]]
[[1,4],[2,5],[3,6]]

If some of the rows are shorter than the following rows, their elements are skipped:

>>> transpose [[10,11],[20],[],[30,31,32]]
[[10,20,30],[11,31],[32]]

intersectBy :: (a -> a -> Bool) -> [a] -> [a] -> [a] #

The intersectBy function is the non-overloaded version of intersect.

intersect :: Eq a => [a] -> [a] -> [a] #

The intersect function takes the list intersection of two lists. For example,

>>> [1,2,3,4] `intersect` [2,4,6,8]
[2,4]

If the first list contains duplicates, so will the result.

>>> [1,2,2,3,4] `intersect` [6,4,4,2]
[2,2,4]

It is a special case of intersectBy, which allows the programmer to supply their own equality test. If the element is found in both the first and the second list, the element from the first list will be used.

unionBy :: (a -> a -> Bool) -> [a] -> [a] -> [a] #

The unionBy function is the non-overloaded version of union.

union :: Eq a => [a] -> [a] -> [a] #

The union function returns the list union of the two lists. For example,

>>> "dog" `union` "cow"
"dogcw"

Duplicates, and elements of the first list, are removed from the the second list, but if the first list contains duplicates, so will the result. It is a special case of unionBy, which allows the programmer to supply their own equality test.

(\\) :: Eq a => [a] -> [a] -> [a] infix 5 #

The \\ function is list difference (non-associative). In the result of xs \\ ys, the first occurrence of each element of ys in turn (if any) has been removed from xs. Thus

(xs ++ ys) \\ xs == ys.

>>> "Hello World!" \\ "ell W"
"Hoorld!"

It is a special case of deleteFirstsBy, which allows the programmer to supply their own equality test.

deleteBy :: (a -> a -> Bool) -> a -> [a] -> [a] #

The deleteBy function behaves like delete, but takes a user-supplied equality predicate.

>>> deleteBy (<=) 4 [1..10]
[1,2,3,5,6,7,8,9,10]

delete :: Eq a => a -> [a] -> [a] #

delete x removes the first occurrence of x from its list argument. For example,

>>> delete 'a' "banana"
"bnana"

It is a special case of deleteBy, which allows the programmer to supply their own equality test.

findIndices :: (a -> Bool) -> [a] -> [Int] #

The findIndices function extends findIndex, by returning the indices of all elements satisfying the predicate, in ascending order.

>>> findIndices (`elem` "aeiou") "Hello World!"
[1,4,7]

findIndex :: (a -> Bool) -> [a] -> Maybe Int #

The findIndex function takes a predicate and a list and returns the index of the first element in the list satisfying the predicate, or Nothing if there is no such element.

>>> findIndex isSpace "Hello World!"
Just 5

elemIndices :: Eq a => a -> [a] -> [Int] #

The elemIndices function extends elemIndex, by returning the indices of all elements equal to the query element, in ascending order.

>>> elemIndices 'o' "Hello World"
[4,7]

elemIndex :: Eq a => a -> [a] -> Maybe Int #

The elemIndex function returns the index of the first element in the given list which is equal (by ==) to the query element, or Nothing if there is no such element.

>>> elemIndex 4 [0..]
Just 4

stripPrefix :: Eq a => [a] -> [a] -> Maybe [a] #

The stripPrefix function drops the given prefix from a list. It returns Nothing if the list did not start with the prefix given, or Just the list after the prefix, if it does.

>>> stripPrefix "foo" "foobar"
Just "bar"

>>> stripPrefix "foo" "foo"
Just ""

>>> stripPrefix "foo" "barfoo"
Nothing

>>> stripPrefix "foo" "barfoobaz"
Nothing

dropWhileEnd :: (a -> Bool) -> [a] -> [a] #

The dropWhileEnd function drops the largest suffix of a list in which the given predicate holds for all elements. For example:

>>> dropWhileEnd isSpace "foo\n"
"foo"

>>> dropWhileEnd isSpace "foo bar"
"foo bar"

dropWhileEnd isSpace ("foo\n" ++ undefined) == "foo" ++ undefined

Since: base-4.5.0.0

isSeparator :: Char -> Bool #

Selects Unicode space and separator characters.

This function returns True if its argument has one of the following GeneralCategorys, or False otherwise:

These classes are defined in the Unicode Character Database, part of the Unicode standard. The same document defines what is and is not a "Separator".

Examples

Expand

Basic usage:

>>> isSeparator 'a'
False
>>> isSeparator '6'
False
>>> isSeparator ' '
True

Warning: newlines and tab characters are not considered separators.

>>> isSeparator '\n'
False
>>> isSeparator '\t'
False

But some more exotic characters are (like HTML's  ):

>>> isSeparator '\160'
True

isNumber :: Char -> Bool #

Selects Unicode numeric characters, including digits from various scripts, Roman numerals, et cetera.

This function returns True if its argument has one of the following GeneralCategorys, or False otherwise:

These classes are defined in the Unicode Character Database, part of the Unicode standard. The same document defines what is and is not a "Number".

Examples

Expand

Basic usage:

>>> isNumber 'a'
False
>>> isNumber '%'
False
>>> isNumber '3'
True

ASCII '0' through '9' are all numbers:

>>> and $ map isNumber ['0'..'9']
True

Unicode Roman numerals are "numbers" as well:

>>> isNumber 'Ⅸ'
True

isMark :: Char -> Bool #

Selects Unicode mark characters, for example accents and the like, which combine with preceding characters.

This function returns True if its argument has one of the following GeneralCategorys, or False otherwise:

These classes are defined in the Unicode Character Database, part of the Unicode standard. The same document defines what is and is not a "Mark".

Examples

Expand

Basic usage:

>>> isMark 'a'
False
>>> isMark '0'
False

Combining marks such as accent characters usually need to follow another character before they become printable:

>>> map isMark "ò"
[False,True]

Puns are not necessarily supported:

>>> isMark '✓'
False

isLetter :: Char -> Bool #

Selects alphabetic Unicode characters (lower-case, upper-case and title-case letters, plus letters of caseless scripts and modifiers letters). This function is equivalent to isAlpha.

This function returns True if its argument has one of the following GeneralCategorys, or False otherwise:

These classes are defined in the Unicode Character Database, part of the Unicode standard. The same document defines what is and is not a "Letter".

Examples

Expand

Basic usage:

>>> isLetter 'a'
True
>>> isLetter 'A'
True
>>> isLetter 'λ'
True
>>> isLetter '0'
False
>>> isLetter '%'
False
>>> isLetter '♥'
False
>>> isLetter '\31'
False

Ensure that isLetter and isAlpha are equivalent.

>>> let chars = [(chr 0)..]
>>> let letters = map isLetter chars
>>> let alphas = map isAlpha chars
>>> letters == alphas
True

digitToInt :: Char -> Int #

Convert a single digit Char to the corresponding Int. This function fails unless its argument satisfies isHexDigit, but recognises both upper- and lower-case hexadecimal digits (that is, '0'..'9', 'a'..'f', 'A'..'F').

Examples

Expand

Characters '0' through '9' are converted properly to 0..9:

>>> map digitToInt ['0'..'9']
[0,1,2,3,4,5,6,7,8,9]

Both upper- and lower-case 'A' through 'F' are converted as well, to 10..15.

>>> map digitToInt ['a'..'f']
[10,11,12,13,14,15]
>>> map digitToInt ['A'..'F']
[10,11,12,13,14,15]

Anything else throws an exception:

>>> digitToInt 'G'
*** Exception: Char.digitToInt: not a digit 'G'
>>> digitToInt '♥'
*** Exception: Char.digitToInt: not a digit '\9829'

readLitChar :: ReadS Char #

Read a string representation of a character, using Haskell source-language escape conventions, and convert it to the character that it encodes. For example:

readLitChar "\\nHello"  =  [('\n', "Hello")]

lexLitChar :: ReadS String #

Read a string representation of a character, using Haskell source-language escape conventions. For example:

lexLitChar  "\\nHello"  =  [("\\n", "Hello")]

toTitle :: Char -> Char #

Convert a letter to the corresponding title-case or upper-case letter, if any. (Title case differs from upper case only for a small number of ligature letters.) Any other character is returned unchanged.

isLower :: Char -> Bool #

Selects lower-case alphabetic Unicode characters (letters).

isPrint :: Char -> Bool #

Selects printable Unicode characters (letters, numbers, marks, punctuation, symbols and spaces).

isControl :: Char -> Bool #

Selects control characters, which are the non-printing characters of the Latin-1 subset of Unicode.

isSymbol :: Char -> Bool #

Selects Unicode symbol characters, including mathematical and currency symbols.

This function returns True if its argument has one of the following GeneralCategorys, or False otherwise:

These classes are defined in the Unicode Character Database, part of the Unicode standard. The same document defines what is and is not a "Symbol".

Examples

Expand

Basic usage:

>>> isSymbol 'a'
False
>>> isSymbol '6'
False
>>> isSymbol '='
True

The definition of "math symbol" may be a little counter-intuitive depending on one's background:

>>> isSymbol '+'
True
>>> isSymbol '-'
False

isPunctuation :: Char -> Bool #

Selects Unicode punctuation characters, including various kinds of connectors, brackets and quotes.

This function returns True if its argument has one of the following GeneralCategorys, or False otherwise:

These classes are defined in the Unicode Character Database, part of the Unicode standard. The same document defines what is and is not a "Punctuation".

Examples

Expand

Basic usage:

>>> isPunctuation 'a'
False
>>> isPunctuation '7'
False
>>> isPunctuation '♥'
False
>>> isPunctuation '"'
True
>>> isPunctuation '?'
True
>>> isPunctuation '—'
True

isHexDigit :: Char -> Bool #

Selects ASCII hexadecimal digits, i.e. '0'..'9', 'a'..'f', 'A'..'F'.

isOctDigit :: Char -> Bool #

Selects ASCII octal digits, i.e. '0'..'7'.

isAsciiUpper :: Char -> Bool #

Selects ASCII upper-case letters, i.e. characters satisfying both isAscii and isUpper.

isAsciiLower :: Char -> Bool #

Selects ASCII lower-case letters, i.e. characters satisfying both isAscii and isLower.

isLatin1 :: Char -> Bool #

Selects the first 256 characters of the Unicode character set, corresponding to the ISO 8859-1 (Latin-1) character set.

isAscii :: Char -> Bool #

Selects the first 128 characters of the Unicode character set, corresponding to the ASCII character set.

generalCategory :: Char -> GeneralCategory #

The Unicode general category of the character. This relies on the Enum instance of GeneralCategory, which must remain in the same order as the categories are presented in the Unicode standard.

Examples

Expand

Basic usage:

>>> generalCategory 'a'
LowercaseLetter
>>> generalCategory 'A'
UppercaseLetter
>>> generalCategory '0'
DecimalNumber
>>> generalCategory '%'
OtherPunctuation
>>> generalCategory '♥'
OtherSymbol
>>> generalCategory '\31'
Control
>>> generalCategory ' '
Space

data GeneralCategory #

Unicode General Categories (column 2 of the UnicodeData table) in the order they are listed in the Unicode standard (the Unicode Character Database, in particular).

Examples

Expand

Basic usage:

>>> :t OtherLetter
OtherLetter :: GeneralCategory

Eq instance:

>>> UppercaseLetter == UppercaseLetter
True
>>> UppercaseLetter == LowercaseLetter
False

Ord instance:

>>> NonSpacingMark <= MathSymbol
True

Enum instance:

>>> enumFromTo ModifierLetter SpacingCombiningMark
[ModifierLetter,OtherLetter,NonSpacingMark,SpacingCombiningMark]

Read instance:

>>> read "DashPunctuation" :: GeneralCategory
DashPunctuation
>>> read "17" :: GeneralCategory
*** Exception: Prelude.read: no parse

Show instance:

>>> show EnclosingMark
"EnclosingMark"

Bounded instance:

>>> minBound :: GeneralCategory
UppercaseLetter
>>> maxBound :: GeneralCategory
NotAssigned

Ix instance:

>>> import Data.Ix ( index )
>>> index (OtherLetter,Control) FinalQuote
12
>>> index (OtherLetter,Control) Format
*** Exception: Error in array index

Constructors

UppercaseLetter	Lu: Letter, Uppercase
LowercaseLetter	Ll: Letter, Lowercase
TitlecaseLetter	Lt: Letter, Titlecase
ModifierLetter	Lm: Letter, Modifier
OtherLetter	Lo: Letter, Other
NonSpacingMark	Mn: Mark, Non-Spacing
SpacingCombiningMark	Mc: Mark, Spacing Combining
EnclosingMark	Me: Mark, Enclosing
DecimalNumber	Nd: Number, Decimal
LetterNumber	Nl: Number, Letter
OtherNumber	No: Number, Other
ConnectorPunctuation	Pc: Punctuation, Connector
DashPunctuation	Pd: Punctuation, Dash
OpenPunctuation	Ps: Punctuation, Open
ClosePunctuation	Pe: Punctuation, Close
InitialQuote	Pi: Punctuation, Initial quote
FinalQuote	Pf: Punctuation, Final quote
OtherPunctuation	Po: Punctuation, Other
MathSymbol	Sm: Symbol, Math
CurrencySymbol	Sc: Symbol, Currency
ModifierSymbol	Sk: Symbol, Modifier
OtherSymbol	So: Symbol, Other
Space	Zs: Separator, Space
LineSeparator	Zl: Separator, Line
ParagraphSeparator	Zp: Separator, Paragraph
Control	Cc: Other, Control
Format	Cf: Other, Format
Surrogate	Cs: Other, Surrogate
PrivateUse	Co: Other, Private Use
NotAssigned	Cn: Other, Not Assigned

Instances

Bounded GeneralCategory	Since: base-2.1
Instance details Defined in GHC.Unicode Methods minBound :: GeneralCategory # maxBound :: GeneralCategory #
Enum GeneralCategory	Since: base-2.1
Instance details Defined in GHC.Unicode Methods succ :: GeneralCategory -> GeneralCategory # pred :: GeneralCategory -> GeneralCategory # toEnum :: Int -> GeneralCategory # fromEnum :: GeneralCategory -> Int # enumFrom :: GeneralCategory -> [GeneralCategory] # enumFromThen :: GeneralCategory -> GeneralCategory -> [GeneralCategory] # enumFromTo :: GeneralCategory -> GeneralCategory -> [GeneralCategory] # enumFromThenTo :: GeneralCategory -> GeneralCategory -> GeneralCategory -> [GeneralCategory] #
Eq GeneralCategory	Since: base-2.1
Instance details Defined in GHC.Unicode Methods (==) :: GeneralCategory -> GeneralCategory -> Bool # (/=) :: GeneralCategory -> GeneralCategory -> Bool #
Ord GeneralCategory	Since: base-2.1
Instance details Defined in GHC.Unicode Methods compare :: GeneralCategory -> GeneralCategory -> Ordering # (<) :: GeneralCategory -> GeneralCategory -> Bool # (<=) :: GeneralCategory -> GeneralCategory -> Bool # (>) :: GeneralCategory -> GeneralCategory -> Bool # (>=) :: GeneralCategory -> GeneralCategory -> Bool # max :: GeneralCategory -> GeneralCategory -> GeneralCategory # min :: GeneralCategory -> GeneralCategory -> GeneralCategory #
Read GeneralCategory	Since: base-2.1
Instance details Defined in GHC.Read Methods readsPrec :: Int -> ReadS GeneralCategory # readList :: ReadS [GeneralCategory] # readPrec :: ReadPrec GeneralCategory # readListPrec :: ReadPrec [GeneralCategory] #
Show GeneralCategory	Since: base-2.1
Instance details Defined in GHC.Unicode Methods showsPrec :: Int -> GeneralCategory -> ShowS # show :: GeneralCategory -> String # showList :: [GeneralCategory] -> ShowS #
Ix GeneralCategory	Since: base-2.1
Instance details Defined in GHC.Unicode Methods range :: (GeneralCategory, GeneralCategory) -> [GeneralCategory] # index :: (GeneralCategory, GeneralCategory) -> GeneralCategory -> Int # unsafeIndex :: (GeneralCategory, GeneralCategory) -> GeneralCategory -> Int inRange :: (GeneralCategory, GeneralCategory) -> GeneralCategory -> Bool # rangeSize :: (GeneralCategory, GeneralCategory) -> Int # unsafeRangeSize :: (GeneralCategory, GeneralCategory) -> Int

(&) :: a -> (a -> b) -> b infixl 1 #

& is a reverse application operator. This provides notational convenience. Its precedence is one higher than that of the forward application operator $, which allows & to be nested in $.

>>> 5 & (+1) & show
"6"

Since: base-4.8.0.0

on :: (b -> b -> c) -> (a -> b) -> a -> a -> c infixl 0 #

on b u x y runs the binary function b on the results of applying unary function u to two arguments x and y. From the opposite perspective, it transforms two inputs and combines the outputs.

((+) `on` f) x y = f x + f y

Typical usage: sortBy (compare `on` fst).

Algebraic properties:

(*) `on` id = (*) -- (if (*) ∉ {⊥, const ⊥})

```
((*) `on` f) `on` g = (*) `on` (f . g)
```
```
flip on f . flip on g = flip on (g . f)
```

intToDigit :: Int -> Char #

Convert an Int in the range 0..15 to the corresponding single digit Char. This function fails on other inputs, and generates lower-case hexadecimal digits.

showLitChar :: Char -> ShowS #

Convert a character to a string using only printable characters, using Haskell source-language escape conventions. For example:

showLitChar '\n' s  =  "\\n" ++ s

iterate' :: (a -> a) -> a -> [a] #

'iterate\'' is the strict version of iterate.

It ensures that the result of each application of force to weak head normal form before proceeding.

scanl' :: (b -> a -> b) -> b -> [a] -> [b] #

A strictly accumulating version of scanl

foldl1' :: (a -> a -> a) -> [a] -> a #

A strict version of foldl1

uncons :: [a] -> Maybe (a, [a]) #

Decompose a list into its head and tail. If the list is empty, returns Nothing. If the list is non-empty, returns Just (x, xs), where x is the head of the list and xs its tail.

Since: base-4.8.0.0

fromJust :: Maybe a -> a #

The fromJust function extracts the element out of a Just and throws an error if its argument is Nothing.

Examples

Expand

Basic usage:

>>> fromJust (Just 1)
1

>>> 2 * (fromJust (Just 10))
20

>>> 2 * (fromJust Nothing)
*** Exception: Maybe.fromJust: Nothing

swap :: (a, b) -> (b, a) #

Swap the components of a pair.

stimesIdempotentMonoid :: (Integral b, Monoid a) => b -> a -> a #

This is a valid definition of stimes for an idempotent Monoid.

When mappend x x = x, this definition should be preferred, because it works in O(1) rather than O(log n)

data IntMap a #

A map of integers to values a.

Instances

Functor IntMap
Instance details Defined in Data.IntMap.Internal Methods fmap :: (a -> b) -> IntMap a -> IntMap b # (<$) :: a -> IntMap b -> IntMap a #
Foldable IntMap
Instance details Defined in Data.IntMap.Internal Methods fold :: Monoid m => IntMap m -> m # foldMap :: Monoid m => (a -> m) -> IntMap a -> m # foldr :: (a -> b -> b) -> b -> IntMap a -> b # foldr' :: (a -> b -> b) -> b -> IntMap a -> b # foldl :: (b -> a -> b) -> b -> IntMap a -> b # foldl' :: (b -> a -> b) -> b -> IntMap a -> b # foldr1 :: (a -> a -> a) -> IntMap a -> a # foldl1 :: (a -> a -> a) -> IntMap a -> a # toList :: IntMap a -> [a] # null :: IntMap a -> Bool # length :: IntMap a -> Int # elem :: Eq a => a -> IntMap a -> Bool # maximum :: Ord a => IntMap a -> a # minimum :: Ord a => IntMap a -> a # sum :: Num a => IntMap a -> a # product :: Num a => IntMap a -> a #
Traversable IntMap
Instance details Defined in Data.IntMap.Internal Methods traverse :: Applicative f => (a -> f b) -> IntMap a -> f (IntMap b) # sequenceA :: Applicative f => IntMap (f a) -> f (IntMap a) # mapM :: Monad m => (a -> m b) -> IntMap a -> m (IntMap b) # sequence :: Monad m => IntMap (m a) -> m (IntMap a) #
ToJSON1 IntMap
Instance details Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a -> Value) -> ([a] -> Value) -> IntMap a -> Value # liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [IntMap a] -> Value # liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> IntMap a -> Encoding # liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [IntMap a] -> Encoding #
FromJSON1 IntMap
Instance details Defined in Data.Aeson.Types.FromJSON Methods liftParseJSON :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser (IntMap a) # liftParseJSONList :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser [IntMap a] #
Eq1 IntMap	Since: containers-0.5.9
Instance details Defined in Data.IntMap.Internal Methods liftEq :: (a -> b -> Bool) -> IntMap a -> IntMap b -> Bool #
Ord1 IntMap	Since: containers-0.5.9
Instance details Defined in Data.IntMap.Internal Methods liftCompare :: (a -> b -> Ordering) -> IntMap a -> IntMap b -> Ordering #
Read1 IntMap	Since: containers-0.5.9
Instance details Defined in Data.IntMap.Internal Methods liftReadsPrec :: (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (IntMap a) # liftReadList :: (Int -> ReadS a) -> ReadS [a] -> ReadS [IntMap a] # liftReadPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec (IntMap a) # liftReadListPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec [IntMap a] #
Show1 IntMap	Since: containers-0.5.9
Instance details Defined in Data.IntMap.Internal Methods liftShowsPrec :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> Int -> IntMap a -> ShowS # liftShowList :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> [IntMap a] -> ShowS #
IsList (IntMap a)	Since: containers-0.5.6.2
Instance details Defined in Data.IntMap.Internal Associated Types type Item (IntMap a) :: Type # Methods fromList :: [Item (IntMap a)] -> IntMap a # fromListN :: Int -> [Item (IntMap a)] -> IntMap a # toList :: IntMap a -> [Item (IntMap a)] #
Eq a => Eq (IntMap a)
Instance details Defined in Data.IntMap.Internal Methods (==) :: IntMap a -> IntMap a -> Bool # (/=) :: IntMap a -> IntMap a -> Bool #
Data a => Data (IntMap a)
Instance details Defined in Data.IntMap.Internal Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> IntMap a -> c (IntMap a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (IntMap a) # toConstr :: IntMap a -> Constr # dataTypeOf :: IntMap a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (IntMap a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (IntMap a)) # gmapT :: (forall b. Data b => b -> b) -> IntMap a -> IntMap a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> IntMap a -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> IntMap a -> r # gmapQ :: (forall d. Data d => d -> u) -> IntMap a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> IntMap a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> IntMap a -> m (IntMap a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> IntMap a -> m (IntMap a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> IntMap a -> m (IntMap a) #
Ord a => Ord (IntMap a)
Instance details Defined in Data.IntMap.Internal Methods compare :: IntMap a -> IntMap a -> Ordering # (<) :: IntMap a -> IntMap a -> Bool # (<=) :: IntMap a -> IntMap a -> Bool # (>) :: IntMap a -> IntMap a -> Bool # (>=) :: IntMap a -> IntMap a -> Bool # max :: IntMap a -> IntMap a -> IntMap a # min :: IntMap a -> IntMap a -> IntMap a #
Read e => Read (IntMap e)
Instance details Defined in Data.IntMap.Internal Methods readsPrec :: Int -> ReadS (IntMap e) # readList :: ReadS [IntMap e] # readPrec :: ReadPrec (IntMap e) # readListPrec :: ReadPrec [IntMap e] #
Show a => Show (IntMap a)
Instance details Defined in Data.IntMap.Internal Methods showsPrec :: Int -> IntMap a -> ShowS # show :: IntMap a -> String # showList :: [IntMap a] -> ShowS #
Semigroup (IntMap a)	Since: containers-0.5.7
Instance details Defined in Data.IntMap.Internal Methods (<>) :: IntMap a -> IntMap a -> IntMap a # sconcat :: NonEmpty (IntMap a) -> IntMap a # stimes :: Integral b => b -> IntMap a -> IntMap a #
Monoid (IntMap a)
Instance details Defined in Data.IntMap.Internal Methods mempty :: IntMap a # mappend :: IntMap a -> IntMap a -> IntMap a # mconcat :: [IntMap a] -> IntMap a #
NFData a => NFData (IntMap a)
Instance details Defined in Data.IntMap.Internal Methods rnf :: IntMap a -> () #
ToJSON a => ToJSON (IntMap a)
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: IntMap a -> Value # toEncoding :: IntMap a -> Encoding # toJSONList :: [IntMap a] -> Value # toEncodingList :: [IntMap a] -> Encoding #
FromJSON a => FromJSON (IntMap a)
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser (IntMap a) # parseJSONList :: Value -> Parser [IntMap a] #
type Item (IntMap a)
Instance details Defined in Data.IntMap.Internal type Item (IntMap a) = (Key, a)

data IntSet #

A set of integers.

Instances

IsList IntSet	Since: containers-0.5.6.2
Instance details Defined in Data.IntSet.Internal Associated Types type Item IntSet :: Type # Methods fromList :: [Item IntSet] -> IntSet # fromListN :: Int -> [Item IntSet] -> IntSet # toList :: IntSet -> [Item IntSet] #
Eq IntSet
Instance details Defined in Data.IntSet.Internal Methods (==) :: IntSet -> IntSet -> Bool # (/=) :: IntSet -> IntSet -> Bool #
Data IntSet
Instance details Defined in Data.IntSet.Internal Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> IntSet -> c IntSet # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c IntSet # toConstr :: IntSet -> Constr # dataTypeOf :: IntSet -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c IntSet) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c IntSet) # gmapT :: (forall b. Data b => b -> b) -> IntSet -> IntSet # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> IntSet -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> IntSet -> r # gmapQ :: (forall d. Data d => d -> u) -> IntSet -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> IntSet -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> IntSet -> m IntSet # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> IntSet -> m IntSet # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> IntSet -> m IntSet #
Ord IntSet
Instance details Defined in Data.IntSet.Internal Methods compare :: IntSet -> IntSet -> Ordering # (<) :: IntSet -> IntSet -> Bool # (<=) :: IntSet -> IntSet -> Bool # (>) :: IntSet -> IntSet -> Bool # (>=) :: IntSet -> IntSet -> Bool # max :: IntSet -> IntSet -> IntSet # min :: IntSet -> IntSet -> IntSet #
Read IntSet
Instance details Defined in Data.IntSet.Internal Methods readsPrec :: Int -> ReadS IntSet # readList :: ReadS [IntSet] # readPrec :: ReadPrec IntSet # readListPrec :: ReadPrec [IntSet] #
Show IntSet
Instance details Defined in Data.IntSet.Internal Methods showsPrec :: Int -> IntSet -> ShowS # show :: IntSet -> String # showList :: [IntSet] -> ShowS #
Semigroup IntSet	Since: containers-0.5.7
Instance details Defined in Data.IntSet.Internal Methods (<>) :: IntSet -> IntSet -> IntSet # sconcat :: NonEmpty IntSet -> IntSet # stimes :: Integral b => b -> IntSet -> IntSet #
Monoid IntSet
Instance details Defined in Data.IntSet.Internal Methods mempty :: IntSet # mappend :: IntSet -> IntSet -> IntSet # mconcat :: [IntSet] -> IntSet #
NFData IntSet
Instance details Defined in Data.IntSet.Internal Methods rnf :: IntSet -> () #
ToJSON IntSet
Instance details Defined in Data.Aeson.Types.ToJSON Methods toJSON :: IntSet -> Value # toEncoding :: IntSet -> Encoding # toJSONList :: [IntSet] -> Value # toEncodingList :: [IntSet] -> Encoding #
FromJSON IntSet
Instance details Defined in Data.Aeson.Types.FromJSON Methods parseJSON :: Value -> Parser IntSet # parseJSONList :: Value -> Parser [IntSet] #
type Item IntSet
Instance details Defined in Data.IntSet.Internal type Item IntSet = Key

rnf2 :: (NFData2 p, NFData a, NFData b) => p a b -> () #

Lift the standard rnf function through the type constructor.

Since: deepseq-1.4.3.0

rnf1 :: (NFData1 f, NFData a) => f a -> () #

Lift the standard rnf function through the type constructor.

Since: deepseq-1.4.3.0

rwhnf :: a -> () #

Reduce to weak head normal form

Equivalent to \x -> seq x ().

Useful for defining NFData for types for which NF=WHNF holds.

data T = C1 | C2 | C3
instance NFData T where rnf = rwhnf

Since: deepseq-1.4.3.0

(<$!!>) :: (Monad m, NFData b) => (a -> b) -> m a -> m b infixl 4 #

Deeply strict version of <$>.

Since: deepseq-1.4.3.0

force :: NFData a => a -> a #

a variant of deepseq that is useful in some circumstances:

force x = x `deepseq` x

force x fully evaluates x, and then returns it. Note that force x only performs evaluation when the value of force x itself is demanded, so essentially it turns shallow evaluation into deep evaluation.

force can be conveniently used in combination with ViewPatterns:

{-# LANGUAGE BangPatterns, ViewPatterns #-}
import Control.DeepSeq

someFun :: ComplexData -> SomeResult
someFun (force -> !arg) = {- 'arg' will be fully evaluated -}

Another useful application is to combine force with evaluate in order to force deep evaluation relative to other IO operations:

import Control.Exception (evaluate)
import Control.DeepSeq

main = do
  result <- evaluate $ force $ pureComputation
  {- 'result' will be fully evaluated at this point -}
  return ()

Finally, here's an exception safe variant of the readFile' example:

readFile' :: FilePath -> IO String
readFile' fn = bracket (openFile fn ReadMode) hClose $ \h ->
                       evaluate . force =<< hGetContents h

Since: deepseq-1.2.0.0

($!!) :: NFData a => (a -> b) -> a -> b infixr 0 #

the deep analogue of $!. In the expression f $!! x, x is fully evaluated before the function f is applied to it.

Since: deepseq-1.2.0.0

deepseq :: NFData a => a -> b -> b #

deepseq: fully evaluates the first argument, before returning the second.

The name deepseq is used to illustrate the relationship to seq: where seq is shallow in the sense that it only evaluates the top level of its argument, deepseq traverses the entire data structure evaluating it completely.

deepseq can be useful for forcing pending exceptions, eradicating space leaks, or forcing lazy I/O to happen. It is also useful in conjunction with parallel Strategies (see the parallel package).

There is no guarantee about the ordering of evaluation. The implementation may evaluate the components of the structure in any order or in parallel. To impose an actual order on evaluation, use pseq from Control.Parallel in the parallel package.

Since: deepseq-1.1.0.0

class NFData1 (f :: Type -> Type) where #

A class of functors that can be fully evaluated.

Since: deepseq-1.4.3.0

Minimal complete definition

Nothing

Methods

liftRnf :: (a -> ()) -> f a -> () #

liftRnf should reduce its argument to normal form (that is, fully evaluate all sub-components), given an argument to reduce a arguments, and then return '()'.

See rnf for the generic deriving.

Instances

NFData1 []	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> [a] -> () #
NFData1 Maybe	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Maybe a -> () #
NFData1 Ratio	Available on `base >=4.9` Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Ratio a -> () #
NFData1 Ptr	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Ptr a -> () #
NFData1 FunPtr	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> FunPtr a -> () #
NFData1 Last	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Last a -> () #
NFData1 Identity	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Identity a -> () #
NFData1 ZipList	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> ZipList a -> () #
NFData1 Fixed	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Fixed a -> () #
NFData1 Min	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Min a -> () #
NFData1 Max	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Max a -> () #
NFData1 First	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> First a -> () #
NFData1 WrappedMonoid	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> WrappedMonoid a -> () #
NFData1 Option	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Option a -> () #
NFData1 StableName	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> StableName a -> () #
NFData1 IORef	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> IORef a -> () #
NFData1 First	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> First a -> () #
NFData1 Last	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Last a -> () #
NFData1 Dual	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Dual a -> () #
NFData1 Sum	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Sum a -> () #
NFData1 Product	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Product a -> () #
NFData1 Down	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Down a -> () #
NFData1 MVar	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> MVar a -> () #
NFData1 NonEmpty	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> NonEmpty a -> () #
NFData a => NFData1 (Either a)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a0 -> ()) -> Either a a0 -> () #
NFData a => NFData1 ((,) a)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a0 -> ()) -> (a, a0) -> () #
NFData a => NFData1 (Array a)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a0 -> ()) -> Array a a0 -> () #
NFData a => NFData1 (Arg a)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a0 -> ()) -> Arg a a0 -> () #
NFData1 (Proxy :: Type -> Type)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Proxy a -> () #
NFData1 (STRef s)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> STRef s a -> () #
(NFData a1, NFData a2) => NFData1 ((,,) a1 a2)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> (a1, a2, a) -> () #
NFData a => NFData1 (Const a :: Type -> Type)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a0 -> ()) -> Const a a0 -> () #
NFData1 ((:~:) a)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a0 -> ()) -> (a :~: a0) -> () #
(NFData a1, NFData a2, NFData a3) => NFData1 ((,,,) a1 a2 a3)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> (a1, a2, a3, a) -> () #
(NFData1 f, NFData1 g) => NFData1 (Product f g)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Product f g a -> () #
(NFData1 f, NFData1 g) => NFData1 (Sum f g)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Sum f g a -> () #
NFData1 ((:~~:) a :: Type -> Type)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a0 -> ()) -> (a :~~: a0) -> () #
(NFData a1, NFData a2, NFData a3, NFData a4) => NFData1 ((,,,,) a1 a2 a3 a4)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> (a1, a2, a3, a4, a) -> () #
(NFData1 f, NFData1 g) => NFData1 (Compose f g)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> Compose f g a -> () #
(NFData a1, NFData a2, NFData a3, NFData a4, NFData a5) => NFData1 ((,,,,,) a1 a2 a3 a4 a5)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> (a1, a2, a3, a4, a5, a) -> () #
(NFData a1, NFData a2, NFData a3, NFData a4, NFData a5, NFData a6) => NFData1 ((,,,,,,) a1 a2 a3 a4 a5 a6)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> (a1, a2, a3, a4, a5, a6, a) -> () #
(NFData a1, NFData a2, NFData a3, NFData a4, NFData a5, NFData a6, NFData a7) => NFData1 ((,,,,,,,) a1 a2 a3 a4 a5 a6 a7)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> (a1, a2, a3, a4, a5, a6, a7, a) -> () #
(NFData a1, NFData a2, NFData a3, NFData a4, NFData a5, NFData a6, NFData a7, NFData a8) => NFData1 ((,,,,,,,,) a1 a2 a3 a4 a5 a6 a7 a8)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf :: (a -> ()) -> (a1, a2, a3, a4, a5, a6, a7, a8, a) -> () #

class NFData2 (p :: Type -> Type -> Type) where #

A class of bifunctors that can be fully evaluated.

Since: deepseq-1.4.3.0

Methods

liftRnf2 :: (a -> ()) -> (b -> ()) -> p a b -> () #

liftRnf2 should reduce its argument to normal form (that is, fully evaluate all sub-components), given functions to reduce a and b arguments respectively, and then return '()'.

Note: Unlike for the unary liftRnf, there is currently no support for generically deriving liftRnf2.

Instances

NFData2 Either	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> Either a b -> () #
NFData2 (,)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> (a, b) -> () #
NFData2 Array	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> Array a b -> () #
NFData2 Arg	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> Arg a b -> () #
NFData2 STRef	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> STRef a b -> () #
NFData a1 => NFData2 ((,,) a1)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> (a1, a, b) -> () #
NFData2 (Const :: Type -> Type -> Type)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> Const a b -> () #
NFData2 ((:~:) :: Type -> Type -> Type)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> (a :~: b) -> () #
(NFData a1, NFData a2) => NFData2 ((,,,) a1 a2)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> (a1, a2, a, b) -> () #
NFData2 ((:~~:) :: Type -> Type -> Type)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> (a :~~: b) -> () #
(NFData a1, NFData a2, NFData a3) => NFData2 ((,,,,) a1 a2 a3)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> (a1, a2, a3, a, b) -> () #
(NFData a1, NFData a2, NFData a3, NFData a4) => NFData2 ((,,,,,) a1 a2 a3 a4)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> (a1, a2, a3, a4, a, b) -> () #
(NFData a1, NFData a2, NFData a3, NFData a4, NFData a5) => NFData2 ((,,,,,,) a1 a2 a3 a4 a5)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> (a1, a2, a3, a4, a5, a, b) -> () #
(NFData a1, NFData a2, NFData a3, NFData a4, NFData a5, NFData a6) => NFData2 ((,,,,,,,) a1 a2 a3 a4 a5 a6)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> (a1, a2, a3, a4, a5, a6, a, b) -> () #
(NFData a1, NFData a2, NFData a3, NFData a4, NFData a5, NFData a6, NFData a7) => NFData2 ((,,,,,,,,) a1 a2 a3 a4 a5 a6 a7)	Since: deepseq-1.4.3.0
Instance details Defined in Control.DeepSeq Methods liftRnf2 :: (a -> ()) -> (b -> ()) -> (a1, a2, a3, a4, a5, a6, a7, a, b) -> () #

class Profunctor (p :: Type -> Type -> Type) where #

Formally, the class Profunctor represents a profunctor from Hask -> Hask.

Intuitively it is a bifunctor where the first argument is contravariant and the second argument is covariant.

You can define a Profunctor by either defining dimap or by defining both lmap and rmap.

If you supply dimap, you should ensure that:

dimap id id ≡ id

If you supply lmap and rmap, ensure:

lmap id ≡ id
rmap id ≡ id

If you supply both, you should also ensure:

dimap f g ≡ lmap f . rmap g

These ensure by parametricity:

dimap (f . g) (h . i) ≡ dimap g h . dimap f i
lmap (f . g) ≡ lmap g . lmap f
rmap (f . g) ≡ rmap f . rmap g

Minimal complete definition

dimap | lmap, rmap

Methods

dimap :: (a -> b) -> (c -> d) -> p b c -> p a d #

Map over both arguments at the same time.

dimap f g ≡ lmap f . rmap g

lmap :: (a -> b) -> p b c -> p a c #

Map the first argument contravariantly.

lmap f ≡ dimap f id

rmap :: (b -> c) -> p a b -> p a c #

Map the second argument covariantly.

rmap ≡ dimap id

Instances

Monad m => Profunctor (Kleisli m)
Instance details Defined in Data.Profunctor.Unsafe Methods dimap :: (a -> b) -> (c -> d) -> Kleisli m b c -> Kleisli m a d # lmap :: (a -> b) -> Kleisli m b c -> Kleisli m a c # rmap :: (b -> c) -> Kleisli m a b -> Kleisli m a c # (#.) :: Coercible c b => q b c -> Kleisli m a b -> Kleisli m a c # (.#) :: Coercible b a => Kleisli m b c -> q a b -> Kleisli m a c #
Profunctor (Tagged :: Type -> Type -> Type)
Instance details Defined in Data.Profunctor.Unsafe Methods dimap :: (a -> b) -> (c -> d) -> Tagged b c -> Tagged a d # lmap :: (a -> b) -> Tagged b c -> Tagged a c # rmap :: (b -> c) -> Tagged a b -> Tagged a c # (#.) :: Coercible c b => q b c -> Tagged a b -> Tagged a c # (.#) :: Coercible b a => Tagged b c -> q a b -> Tagged a c #
Profunctor ((->) :: Type -> Type -> Type)
Instance details Defined in Data.Profunctor.Unsafe Methods dimap :: (a -> b) -> (c -> d) -> (b -> c) -> a -> d # lmap :: (a -> b) -> (b -> c) -> a -> c # rmap :: (b -> c) -> (a -> b) -> a -> c # (#.) :: Coercible c b => q b c -> (a -> b) -> a -> c # (.#) :: Coercible b a => (b -> c) -> q a b -> a -> c #
Functor w => Profunctor (Cokleisli w)
Instance details Defined in Data.Profunctor.Unsafe Methods dimap :: (a -> b) -> (c -> d) -> Cokleisli w b c -> Cokleisli w a d # lmap :: (a -> b) -> Cokleisli w b c -> Cokleisli w a c # rmap :: (b -> c) -> Cokleisli w a b -> Cokleisli w a c # (#.) :: Coercible c b => q b c -> Cokleisli w a b -> Cokleisli w a c # (.#) :: Coercible b a => Cokleisli w b c -> q a b -> Cokleisli w a c #
Functor f => Profunctor (Joker f :: Type -> Type -> Type)
Instance details Defined in Data.Profunctor.Unsafe Methods dimap :: (a -> b) -> (c -> d) -> Joker f b c -> Joker f a d # lmap :: (a -> b) -> Joker f b c -> Joker f a c # rmap :: (b -> c) -> Joker f a b -> Joker f a c # (#.) :: Coercible c b => q b c -> Joker f a b -> Joker f a c # (.#) :: Coercible b a => Joker f b c -> q a b -> Joker f a c #
Contravariant f => Profunctor (Clown f :: Type -> Type -> Type)
Instance details Defined in Data.Profunctor.Unsafe Methods dimap :: (a -> b) -> (c -> d) -> Clown f b c -> Clown f a d # lmap :: (a -> b) -> Clown f b c -> Clown f a c # rmap :: (b -> c) -> Clown f a b -> Clown f a c # (#.) :: Coercible c b => q b c -> Clown f a b -> Clown f a c # (.#) :: Coercible b a => Clown f b c -> q a b -> Clown f a c #
(Profunctor p, Profunctor q) => Profunctor (Sum p q)
Instance details Defined in Data.Profunctor.Unsafe Methods dimap :: (a -> b) -> (c -> d) -> Sum p q b c -> Sum p q a d # lmap :: (a -> b) -> Sum p q b c -> Sum p q a c # rmap :: (b -> c) -> Sum p q a b -> Sum p q a c # (#.) :: Coercible c b => q0 b c -> Sum p q a b -> Sum p q a c # (.#) :: Coercible b a => Sum p q b c -> q0 a b -> Sum p q a c #
(Profunctor p, Profunctor q) => Profunctor (Product p q)
Instance details Defined in Data.Profunctor.Unsafe Methods dimap :: (a -> b) -> (c -> d) -> Product p q b c -> Product p q a d # lmap :: (a -> b) -> Product p q b c -> Product p q a c # rmap :: (b -> c) -> Product p q a b -> Product p q a c # (#.) :: Coercible c b => q0 b c -> Product p q a b -> Product p q a c # (.#) :: Coercible b a => Product p q b c -> q0 a b -> Product p q a c #
(Functor f, Profunctor p) => Profunctor (Tannen f p)
Instance details Defined in Data.Profunctor.Unsafe Methods dimap :: (a -> b) -> (c -> d) -> Tannen f p b c -> Tannen f p a d # lmap :: (a -> b) -> Tannen f p b c -> Tannen f p a c # rmap :: (b -> c) -> Tannen f p a b -> Tannen f p a c # (#.) :: Coercible c b => q b c -> Tannen f p a b -> Tannen f p a c # (.#) :: Coercible b a => Tannen f p b c -> q a b -> Tannen f p a c #
(Profunctor p, Functor f, Functor g) => Profunctor (Biff p f g)
Instance details Defined in Data.Profunctor.Unsafe Methods dimap :: (a -> b) -> (c -> d) -> Biff p f g b c -> Biff p f g a d # lmap :: (a -> b) -> Biff p f g b c -> Biff p f g a c # rmap :: (b -> c) -> Biff p f g a b -> Biff p f g a c # (#.) :: Coercible c b => q b c -> Biff p f g a b -> Biff p f g a c # (.#) :: Coercible b a => Biff p f g b c -> q a b -> Biff p f g a c #

data PointedList a #

The implementation of the pointed list structure which tracks the current position in the list structure.

Instances

Functor PointedList
Instance details Defined in Data.List.PointedList Methods fmap :: (a -> b) -> PointedList a -> PointedList b # (<$) :: a -> PointedList b -> PointedList a #
Foldable PointedList
Instance details Defined in Data.List.PointedList Methods fold :: Monoid m => PointedList m -> m # foldMap :: Monoid m => (a -> m) -> PointedList a -> m # foldr :: (a -> b -> b) -> b -> PointedList a -> b # foldr' :: (a -> b -> b) -> b -> PointedList a -> b # foldl :: (b -> a -> b) -> b -> PointedList a -> b # foldl' :: (b -> a -> b) -> b -> PointedList a -> b # foldr1 :: (a -> a -> a) -> PointedList a -> a # foldl1 :: (a -> a -> a) -> PointedList a -> a # toList :: PointedList a -> [a] # null :: PointedList a -> Bool # length :: PointedList a -> Int # elem :: Eq a => a -> PointedList a -> Bool # maximum :: Ord a => PointedList a -> a # minimum :: Ord a => PointedList a -> a # sum :: Num a => PointedList a -> a # product :: Num a => PointedList a -> a #
Traversable PointedList
Instance details Defined in Data.List.PointedList Methods traverse :: Applicative f => (a -> f b) -> PointedList a -> f (PointedList b) # sequenceA :: Applicative f => PointedList (f a) -> f (PointedList a) # mapM :: Monad m => (a -> m b) -> PointedList a -> m (PointedList b) # sequence :: Monad m => PointedList (m a) -> m (PointedList a) #
Eq a => Eq (PointedList a)
Instance details Defined in Data.List.PointedList Methods (==) :: PointedList a -> PointedList a -> Bool # (/=) :: PointedList a -> PointedList a -> Bool #
Show a => Show (PointedList a)
Instance details Defined in Data.List.PointedList Methods showsPrec :: Int -> PointedList a -> ShowS # show :: PointedList a -> String # showList :: [PointedList a] -> ShowS #
Binary a => Binary (PointedList a)
Instance details Defined in Data.List.PointedList Methods put :: PointedList a -> Put # get :: Get (PointedList a) # putList :: [PointedList a] -> Put #

data ChallengeSpec Source #

A specification for a specific challenge. Should consist of a day and a lowercase character.

Constructors

CS
Fields _csDay :: Finite 25 _csPart :: Char

type ChallengeMap = Map (Finite 25) (Map Char Challenge) Source #

A map of days to parts to challenges.

data ChallengeError Source #

Errors that might happen when running a Challenge on some input.

Constructors

CEParse
CESolve

Instances

Eq ChallengeError Source #
Instance details Defined in AOC2018.Types Methods (==) :: ChallengeError -> ChallengeError -> Bool # (/=) :: ChallengeError -> ChallengeError -> Bool #
Ord ChallengeError Source #
Instance details Defined in AOC2018.Types Methods compare :: ChallengeError -> ChallengeError -> Ordering # (<) :: ChallengeError -> ChallengeError -> Bool # (<=) :: ChallengeError -> ChallengeError -> Bool # (>) :: ChallengeError -> ChallengeError -> Bool # (>=) :: ChallengeError -> ChallengeError -> Bool # max :: ChallengeError -> ChallengeError -> ChallengeError # min :: ChallengeError -> ChallengeError -> ChallengeError #
Show ChallengeError Source #
Instance details Defined in AOC2018.Types Methods showsPrec :: Int -> ChallengeError -> ShowS # show :: ChallengeError -> String # showList :: [ChallengeError] -> ShowS #
Generic ChallengeError Source #
Instance details Defined in AOC2018.Types Associated Types type Rep ChallengeError :: Type -> Type # Methods from :: ChallengeError -> Rep ChallengeError x # to :: Rep ChallengeError x -> ChallengeError #
NFData ChallengeError Source #
Instance details Defined in AOC2018.Types Methods rnf :: ChallengeError -> () #
type Rep ChallengeError Source #
Instance details Defined in AOC2018.Types type Rep ChallengeError = D1 (MetaData "ChallengeError" "AOC2018.Types" "aoc2018-0.1.0.0-JneIPlhz1ZYA4avhMpZaIs" False) (C1 (MetaCons "CEParse" PrefixI False) (U1 :: Type -> Type) :+: C1 (MetaCons "CESolve" PrefixI False) (U1 :: Type -> Type))

data Challenge where Source #

Abstracting over the type of a challenge solver to help with cleaner solutions.

Consists of a parser, a shower, and a solver. The solver solves a general a -> Maybe b function, and the parser and shower are used to handle the boilerplate of parsing and printing the solution.

Constructors

MkC
Fields :: { cParse :: String -> Maybe a , cSolve :: a -> Maybe b , cShow :: b -> String } -> Challenge

withSolver' :: (String -> String) -> Challenge Source #

Construct a Challenge from just a normal String -> String solver. Does no parsing or special printing treatment.

withSolver :: (String -> Maybe String) -> Challenge Source #

Construct a Challenge from a String -> Maybe String solver, which might fail. Does no parsing or special printing treatment.

runChallenge :: Challenge -> String -> Either ChallengeError String Source #

Run a Challenge on some input.

(!!!) :: [a] -> Int -> a Source #

Strict (!!)

strip :: String -> String Source #

Strip trailing and leading whitespace.

iterateMaybe :: (a -> Maybe a) -> a -> [a] Source #

Iterate until a Nothing is produced

dup :: a -> (a, a) Source #

scanlT :: Traversable t => (b -> a -> b) -> b -> t a -> t b Source #

scanl generalized to all Traversable.

scanrT :: Traversable t => (a -> b -> b) -> b -> t a -> t b Source #

scanr generalized to all Traversable.

eitherToMaybe :: Either e a -> Maybe a Source #

maybeToEither :: e -> Maybe a -> Either e a Source #

firstRepeated :: Ord a => [a] -> Maybe a Source #

Lazily find the first repeated item.

Documentation

Examples

Examples

Generic NFData deriving

Compatibility with previous deepseq versions

Examples

Examples

Examples

Examples

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Examples

`Generic` `NFData` deriving

Compatibility with previous `deepseq` versions